Plant Atlas of Arizona (PAPAZ)
NPS - Intermountain
USFWS - Region 2
New Mexico Flores
Plant Atlas Project of Arizona (PAPAZ)
Southwest Colorado Wildflowers
Vascular Plants of the Gila Wilderness
Consortium of Midwest Herbaria
Consortium of Southern Rocky Mountain Herbaria
Intermountain Region Herbaria Network (IRHN)
North American Network of Small Herbaria (NANSH)
Northern Great Plains Herbaria
Red de Herbarios del Noroeste de México (northern Mexico)
SERNEC - Southeastern USA
Texas Oklahoma Regional Consortium of Herbaria (TORCH)
Joining a Symbiota Portal
L. D. Gottlieb in Flora of North America (vol. 19, 20 and 21)
, 5-30 cm; taprooted.
1-3, erect or ascending, branched from bases; distal stems, branches, and involucres conspicuously dotted with short, stipitate, flat-topped glands that resemble tacks.
basal and cauline; alternate; sessile; basal blades pinnately lobed (lobes narrow, linear, often delicate, spreading, margins entire, smooth); distal reduced to linear, entire bracts.
borne singly or in open, cymiform arrays.
(1-3 cm) not inflated, not bracteate.
of 8-16, reflexed, unequal bractlets (lengths to
campanulate, 5-12+ mm diam.
12-20 in 1 series, linear-lanceolate, equal, margins scarious, apices acute
flat, smooth, bristly, epaleate (each floret subtended by 1 fine, capillary bristle).
ca. 25; corollas white or yellow (showy).
tan to brown, fusiform, beaked, ribs 5, separated by longitudinal grooves, faces glabrous or scabridulous;
(borne on denticulate cups at beak tips) falling (together), of 50-60+, white, basally connate, smooth bristles 5-8(-9) mm in 1 series.
Encyclopedia of Life
USDA PLANTS Database
Flora of North America
International Plant Names Index
Google Search Engine
BOLD Systems - Barcode of Life Data Systems
Global Biotic Interactions (GloBI)
NCBI - National Center for Biotechnology Information
Species within checklist:
Development of SEINet,
, and several of the specimen databases have been supported by National Science Foundation Grants (