Youngia
youngia
1–5+, erect (often scapiform), usually branched distally, sometimes throughout, proximally glabrous, puberulent, or tomentose.
all or mostly basal;
petiolate (petiole bases often dilated, ± clasping);
blades oblong or ovate to oblanceolate, margins usually pinnately lobed (± lyrate), ultimate margins denticulate.
(filiform) not distally inflated, seldom bracteate.
cylindric to campanulate, 2–3+ mm diam.
flat to convex, ± pitted, glabrous, epaleate.
8–25+;
corollas yellow, sometimes abaxially purplish (anther bases with linear, acute auricles).
usually 8 in 1–2 series, lanceolate to linear, ± equal (reflexed in fruit), margins ± scarious, apices obtuse to acute.
of 3–5+, deltate to ovate (membranous) bractlets.
(4–150) in corymbiform to paniculiform arrays.
± reddish brown, ± fusiform and compressed [± terete], weakly or not beaked, ribs 11–13, ± spiculate to scabrellous on ribs;
pappi (borne on discs at tips of cypselae) persistent (fragile) [falling], of 40–60+, basally coherent [distinct], white [yellowish or grayish], subequal, smooth to barbellulate bristles in ± 1 series.
= 5 or 8.
Youngia
Species ca. 30 (1 in the flora).
Youngia americana Babcock (based on a specimen from Alaska) has not been used as an accepted name for plants in the flora area; it was treated as a synonym of Crepis nana var. lyratifolia (Turczaninow) Hultén by E. Hultén (1968).
Etymology: For “deux Anglais célèbres, l’un comme poète, l’autre comme physicien,” both named Young; the poet may have been Edward Young (also dramatist), 1683–1765; the physician may have been Thomas Young (also physicist and Egyptologist), 1773–1829
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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