Aster spp.
Family: Asteraceae
Aster image
Robert Mohlenbrock  
Perennials [subshrubs, shrubs], 3-300 cm (rhizomatous, rhizomes long or short, plants sometimes with branched caudices). Stems ascending to erect, simple, ± densely hairy [glabrous], sometimes stipitate-glandular. Leaves basal and/or cauline; sessile or petiolate; blades 1-nerved, spatulate, obovate (mainly basal), oblanceolate, lance-oblong, lanceolate, or linear, distal often reduced, margins entire or serrate [lobed], faces hairy. Heads radiate, borne singly or in corymbiform [paniculiform] arrays. Involucres broadly campanulate or hemispheric [cylindro-campanulate], 15-25 mm diam. Phyllaries persistent, 25-50 in 2-4 series, 1-nerved (flat), ovate to lanceolate, unequal to subequal, bases ± scarious, herbaceous distally or not, green zones along midnerves, margins scarious to hyaline, densely villous, strigillose, or glabrous, sometimes ± short-stipitate-glandular. Receptacles flat or convex, pitted, epaleate. Ray florets 14-55(-100)[-150] in 1 series, pistillate, fertile; corollas white, pink, purple, blue, or violet. Disc florets 20-100+, bisexual, fertile; corollas usually yellow (sometimes reddening), slightly ampliate [tubular], tubes shorter than to equaling funnelform or campanulate throats, lobes 5, usually erect to spreading, rarely reflexed, lanceolate; style-branch appendages lanceolate. Cypselae obconic, compressed, 2 marginal ribs, faces ± densely strigillose [glabrous], sometimes short-stipitate-glandular; pappi persistent, of 20-30 white to tawny, ± equal, barbellate, apically usually attenuate, sometimes ± clavate bristles in 1-2 series. x = 9. Some species of Aster are cultivated and sold in the horticultural trade (J. C. Semple et al. 2002). Some species, notably the type of the genus, Aster amellus Linnaeus, have a large number of cultivars. The genus name is the type of the family name Asteraceae. As circumscribed here, Aster excludes members of the Crinitaria-Galatella-Tripolium complex, which are closer to the Bellidinae ( Bellis, Bellium, Bellidiastrum; O. Fiz et al. 2002). Analysis of molecular data shows that Aster in the strict sense includes Diplactis, Kalimeris, Heteropappus, and a few other eastern Asiatic segregates. The relationship of Aster in the strict sense to other Astereae genera is unclear, and the delimitation of subtribe Asterinae in the sense of G. L. Nesom (1994b) is still uncertain.

Images
not available
Map not
Available
Image of Aster adnatus
Map not
Available
Image of Aster ageratoides
Map not
Available
Images
not available
Map not
Available
Image of Aster amelloides
Map not
Available
Image of Aster anomalus
Map not
Available
Images
not available
Map not
Available
Image of Aster apricus
Map not
Available
Image of Aster asperifolius
Map not
Available
Image of Aster asperugineus
Map not
Available
Image of Aster batesii
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster blakei
Map not
Available
Images
not available
Map not
Available
Image of Aster bracei
Map not
Available
Image of Aster brachypholis
Map not
Available
Images
not available
Aster
Images
not available
Aster
Images
not available
Map not
Available
Image of Aster camptosorus
Map not
Available
Image of Aster carnosus
Map not
Available
Images
not available
Map not
Available
Image of Aster chapmanii
Map not
Available
Image of Aster chinensis
Map not
Available
Image of Aster chlorolepis
Map not
Available
Images
not available
Map not
Available
Image of Aster claviger
Map not
Available
Image of Aster cognatus
Map not
Available
Images
not available
Map not
Available
Image of Aster coloradoensis
Map not
Available
Images
not available
Map not
Available
Image of Aster commixtus
Map not
Available
Image of Aster concinnus
Map not
Available
Image of Aster conduplicatus
Map not
Available
Image of Aster conspicuus
Map not
Available
Image of Aster continuus
Map not
Available
Image of Aster copelandii
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster corymbiformis
Map not
Available
Image of Aster covillei
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster curvescens
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster deserticola
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster douglasii
Map not
Available
Images
not available
Map not
Available
Image of Aster elatus
Map not
Available
Image of Aster elodes
Map not
Available
Image of Aster ensifer
Map not
Available
Image of Aster eryngiifolius
Map not
Available
Image of Aster eulae
Map not
Available
Images
not available
Map not
Available
Image of Aster fastigiatus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster fontinalis
Map not
Available
Image of Aster forwoodii
Map not
Available
Image of Aster franklinianus
Map not
Available
Image of Aster fruticosus
Map not
Available
Images
not available
Map not
Available
Image of Aster gaspensis
Map not
Available
Images
not available
Map not
Available
Image of Aster georgianus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster glaucescens
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Aster
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster gracilis
Map not
Available
Image of Aster gravesii
Map not
Available
Image of Aster greatai
Map not
Available
Image of Aster griseolus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster humilis
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster iinumae
Map not
Available
Image of Aster indicus
Map not
Available
Image of Aster infirmus
Map not
Available
Images
not available
Map not
Available
Image of Aster johannensis
Map not
Available
Image of Aster juniperinus
Map not
Available
Image of Aster kentuckiensis
Map not
Available
Image of Aster latissimifolius
Map not
Available
Image of Aster laxifolius
Map not
Available
Image of Aster leucopsis
Map not
Available
Images
not available
Map not
Available
Image of Aster lindleyanus
Map not
Available
Image of Aster linearifolius
Map not
Available
Images
not available
Map not
Available
Image of Aster lonchophyllus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster lowrieanus
Map not
Available
Image of Aster lucidulus
Map not
Available
Image of Aster lutescens
Map not
Available
Image of Aster maackii
Map not
Available
Image of Aster maccallae
Map not
Available
Images
not available
Map not
Available
Image of Aster meritus
Map not
Available
Images
not available
Map not
Available
Image of Aster mirabilis
Map not
Available
Image of Aster miser
Map not
Available
Image of Aster missouriensis
Map not
Available
Image of Aster mohrii
Map not
Available
Image of Aster mollis
Map not
Available
Images
not available
Aster
Image of Aster mongolicus
Map not
Available
Image of Aster nebraskensis
Map not
Available
Image of Aster nemoralis
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster paludicola
Map not
Available
Image of Aster pantotrichus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster pedionomus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster phyllolepis
Map not
Available
Image of Aster plumosus
Map not
Available
Image of Aster poaceus
Map not
Available
Image of Aster priceae
Map not
Available
Image of Aster proteus
Map not
Available
Image of Aster ptarmicoides
Map not
Available
Image of Aster pubentior
Map not
Available
Image of Aster pulchellus
Map not
Available
Image of Aster punctatus
Map not
Available
Images
not available
Map not
Available
Image of Aster pygmaeus
Map not
Available
Image of Aster pyrenaeus
Map not
Available
Image of Aster radula
Map not
Available
Image of Aster reticulatus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster sandwicensis
Map not
Available
Image of Aster saundersii
Map not
Available
Image of Aster saxatilis
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster scabricaulis
Map not
Available
Image of Aster schistosus
Map not
Available
Image of Aster sedifolius
Map not
Available
Image of Aster sericocarpoides
Map not
Available
Images
not available
Map not
Available
Image of Aster simmondsii
Map not
Available
Image of Aster simulatus
Map not
Available
Images
not available
Map not
Available
Image of Aster smallii
Map not
Available
Image of Aster sonomensis
Map not
Available
Image of Aster spatelliformis
Map not
Available
Image of Aster spectabilis
Map not
Available
Image of Aster spinulosus
Map not
Available
Image of Aster standleyi
Map not
Available
Image of Aster stenomeres
Map not
Available
Image of Aster subasper
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster subsalignus
Map not
Available
Image of Aster sulznerae
Map not
Available
Image of Aster surculosus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster tataricus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster texanus
Map not
Available
Image of Aster thermalis
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster tongolensis
Map not
Available
Image of Aster torreyi
Map not
Available
Image of Aster tradescantii
Map not
Available
Image of Aster triangularis
Map not
Available
Image of Aster trigonicus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster underwoodii
Map not
Available
Images
not available
Aster
Image of Aster vernalis
Map not
Available
Image of Aster verutifolius
Map not
Available
Image of Aster villosus
Map not
Available
Images
not available
Aster
Image of Aster walteri
Map not
Available
Image of Aster watsonii
Map not
Available
Image of Aster wilsonii
Map not
Available
Images
not available
Map not
Available
Image of Aster x amethystinus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster x longulus
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster x versicolor
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Aster yosemitanus
Map not
Available
Image of Aster yukonensis
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Erigeron elmeri
Map not
Available
Image of Erigeron jamaicensis
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Images
not available
Map not
Available
Image of Inula germanica
Map not
Available
Image of Inula spiraeifolia
Map not
Available
Image of Noticastrum erectum
Map not
Available
Images
not available
Map not
Available
Image of Senecio rosmarinifolius
Map not
Available
Image of Symphyotrichum bullatum
Map not
Available
Images
not available
Map not
Available
Image of Symphyotrichum pygmaeum
Map not
Available
Images
not available
Aster
Image of Tripolium pannonicum
Map not
Available