Youngia

Cassini

Ann. Sci. Nat. (Paris) 23: 88. 1831.

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
Treatment appears in FNA Volume 19. Treatment on page 255. Mentioned on page 217.

Annuals, biennials [perennials], (10–)20–90+ cm; taprooted. Stems 1–5+, erect (often scapiform), usually branched distally, sometimes throughout, proximally glabrous, puberulent, or tomentose. Leaves all or mostly basal; petiolate (petiole bases often dilated, ± clasping); blades oblong or ovate to oblanceolate, margins usually pinnately lobed (± lyrate), ultimate margins denticulate. Heads (4–150) in corymbiform to paniculiform arrays. Peduncles (filiform) not distally inflated, seldom bracteate. Calyculi of 3–5+, deltate to ovate (membranous) bractlets. Involucres cylindric to campanulate, 2–3+ mm diam. Phyllaries usually 8 in 1–2 series, lanceolate to linear, ± equal (reflexed in fruit), margins ± scarious, apices obtuse to acute. Receptacles flat to convex, ± pitted, glabrous, epaleate. Florets 8–25+; corollas yellow, sometimes abaxially purplish (anther bases with linear, acute auricles). Cypselae ± 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. x = 5 or 8.

Distribution

Introduced; Asia, introduced also in South America, Europe, Africa, Pacific Islands, Australia.

Discussion

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).

Lower Taxa

... more about "Youngia"
Phyllis L. Spurr +
Cassini +
Asia +, introduced also in South America +, Europe +, Africa +, Pacific Islands +  and Australia. +
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 +  and the physician may have been Thomas Young (also physicist and Egyptologist), 1773–1829 +
Ann. Sci. Nat. (Paris) +
babcock1937a +
Undefined tribe Lactuceae +
Youngia +
Asteraceae tribe Cichorieae +