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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus: Brickellia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Brickellia microphylla (Nutt.) A. Gray
Habit: Shrub 30--70 cm. Stem: much-branched, puberulent or with long, crooked hairs mixed with glands or gland-tipped hairs, occasionally tomentose. Leaf: alternate, petiole 0--3 mm, blade 3--20 mm, 1--15 mm wide, ovate to +- round, entire, coarsely dentate, or serrate, base acute to obtuse or rounded, tip rounded to acute, faces glandular, and with long, crooked hairs or small, sharp, bristle-like hairs. Inflorescence: heads in loose, panicle-like clusters, often grouped at branch ends; peduncle bracted, 2--10 mm, sticky glandular or glands mixed with long, crooked hairs; involucre 7--12 mm, cylindric to narrowly bell-shaped; phyllaries 30--48, in 6--9 series, often purple-tinged, 3--5-striate, recurved or spreading, tip acute to acuminate, margin scarious; outer obovate to +- round, puberulent and glandular, middle occasionally 3-toothed with center tooth elongated, inner linear-oblong, glabrous or sparsely gland-dotted. Flower: 8--28; corolla 5.5--7, mm pale yellow, often purple-tinged. Fruit: 3.5--4.7 mm, glabrous or minutely stiff-spreading-hairy; pappus bristles 18--24. Chromosomes: 2n=18.
Note: Varieties intergrade.
Unabridged Note: Brickellia microphylla var. scabra has a more eastern and southern distribution; it grades into Brickellia microphylla var. microphylla in southern and central Utah and eastern California. Brickellia watsonii, more recently recognized as Brickellia microphylla var. watsonii, is distinguished by its tomentose-puberulent, often glandular, indument (contrasted with the stems of Brickellia microphylla var. microphylla which are sparsely to densely covered with long, crooked hairs, these often intermixed with glands or gland-tipped hairs), and heads with +- 18 flowers (versus 15--24(34) in Brickellia microphylla var. microphylla); such distinctions have proved to be weakly substantiated, at best. Many specimens from UT and some from eastern DMtns are densely tomentose (closely approaching Brickellia nevinii), but numerous other specimens display only a slight degree of tomentum along with numerous long gland-tipped hairs. Most of these have 16--24 florets per head and can be assigned to Brickellia microphylla var. microphylla. Other specimens (some previously determined as Brickellia watsonii) of eastern DMoj have fewer florets per head (8--12) and are puberulent or hairy.
eFlora Treatment Author: Randall W. Scott
Jepson Online Interchange
Previous taxon: Brickellia longifolia var. multiflora
Next taxon: Brickellia microphylla var. microphylla
Citation for this treatment: Randall W. Scott 2017. Brickellia microphylla, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=1819, accessed on March 30, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 30, 2017.