Thymophylla pentachaeta (DC.) Small
Family: Asteraceae
fiveneedle pricklyleaf,  more...
[Dyssodia cupulata ,  more]
Thymophylla pentachaeta image
Max Licher  
Perennials or subshrubs, ± grayish to green, to 15(-25) cm, usually puberulent to canescent, sometimes glabrescent or glabrous. Stems erect or spreading. Leaves mostly opposite; blades mostly pinnately lobed, 6-28+ mm overall, lobes 3-11 linear to filiform (usually stiff, setiform). Peduncles 20-100 mm, puberulent or glabrous. Calyculi 0, or of 1-5 deltate bractlets, lengths less than 1/2 phyllaries. Involucres obconic to campanulate or hemispheric, 4-6 mm. Phyllaries 12-21, margins of outer distinct 1/5 to nearly all their lengths, abaxial faces puberulent or glabrous. Ray florets (8-)12-21; corollas yellow to orange-yellow, laminae 2-6(-8) × 1-3 mm. Disc florets 16-40 or 50-80; corollas yellow, 2-4 mm (tending to zygomorphy in peripheral florets in some plants). Cypselae 2-3 mm; pappi of 10 erose and/or aristate scales mostly 1-3 mm.
FNA 2006, Martin and Hutchins 1980, Heil et al. 2013
Duration: Perennial Nativity: Native Lifeform: Subshrub General: Mildly aromatic perennial herbs to subshrubs, to 25 cm tall, from a woody taproot; stems erect, densely branched, grayish to green, usually densely puberulent. Leaves: Opposite and crowded along the stems; blades 1-3 cm long, pinnately divided into 3-7 stiff, sharp, linear to filiform lobes, these less than 1 mm wide, sparsely hairy and conspicuously gland-dotted. Flowers: Flower heads yellow and radiate, held above the leaves on slender peduncles 2-10 cm long; involucres cylindric, obconic, campanulate or hemispheric, 4-6 mm high, the bracts (phyllaries) 12-21 in 2 subequal series; outer phyllaries ciliate and fused to the inner phyllaries; inner phyllaries fused to each other, irregularly toothed at apex; ray florets 12-21 per flower head, the laminae (ray petals) 2-6 mm long, yellow-orange; disc florets 16-80 per flower head, yellow. Fruits: Achenes 2-3 mm long, black, linear; topped with a pappus of 10 irregularly toothed scales, 1-3 mm long. Ecology: Found on dry slopes and flats, especially on limestone soils, from 3,500-5,500 ft (1067-1676 m); flowers May-August. Distribution: s CA, s NV, AZ, s NM, s TX; south to s MEX; also in S. America. Notes: A low-growing perennial with a slightly woody base and small but showy yellow flower heads; note the translucent to amber oil glands on leaves and phyllaries; and the narrow, lobed leaves which are pleasantly fragrant when crushed. Distinguish from T. acerosa by the leaves and the locations of the flowers. T. acerosa has simple, linear, needle-like leaves 1-2 cm long, and sessile to subsessile flowers that are embedded in the foliage, while T. pentachaeta has leaves that are pinnately divided into 3-7 needle-like lobes, and flowers that are held above the foliage on peduncles 2-10 cm long. T. pentachaeta is also usually not as robust as T. acerosa. There are two varieties in the region. Var. hartwegii has cylindric involucres, 2-3.5 mm wide, with 16-40 disc florets; it is found in AZ, NM, and TX. Var. belendium has campanulate to hemispheric involucres, 4-5 mm diameter, with 50-80 disc florets; it occurs from CA and NV east to TX Ethnobotany: Decoction of the root taken as a purgative. Etymology: Thymophylla is from the Greek thymos, thyme, and phyllon, for leaf, alluding to the similarity to the leaves of the thyme plant; pentachaeta comes from Greek penta for five, and chaeta for bristle or long hair, referring to the teeth on the pappus scales. Synonyms: Dyssodia pentachaeta Editor: SBuckley 2010, FSCoburn 2015, AHazelton 2017
Thymophylla pentachaeta image
Max Licher  
Thymophylla pentachaeta image
Max Licher  
Thymophylla pentachaeta image
Max Licher  
Thymophylla pentachaeta image
Max Licher  
Thymophylla pentachaeta image
Max Licher  
Thymophylla pentachaeta image
Max Licher  
Thymophylla pentachaeta image
Liz Makings  
Thymophylla pentachaeta image
Patrick Alexander  
Thymophylla pentachaeta image
Patrick Alexander  
Thymophylla pentachaeta image
Anne Barber  
Thymophylla pentachaeta image
Anne Barber  
Thymophylla pentachaeta image
William Radke  
Thymophylla pentachaeta image
Gregory Gust  
Thymophylla pentachaeta image
Gregory Gust  
Thymophylla pentachaeta image
Gregory Gust  
Thymophylla pentachaeta image
Gregory Gust  
Thymophylla pentachaeta image
Gregory Gust  
Thymophylla pentachaeta image
Gregory Gust  
Thymophylla pentachaeta image
Thomas Van Devender  
Thymophylla pentachaeta image
Sue Carnahan  
Thymophylla pentachaeta image
Thomas Van Devender  
Thymophylla pentachaeta image
Sue Carnahan  
Thymophylla pentachaeta image
Sue Carnahan  
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image
Thymophylla pentachaeta image