488 compos!t& (Hary.) [Stobeea. 
Heads radiate : 
Leaves alternate, linear or subulate, quite entire: bristles very long: 
Lvs. linear, white beneath; stems glandular 
pubescent ... ©... sss | see | ee cee ove (28) insignis. 
Lys. subulate, with strongly revolute edges ; 
eter glabrous 0.05 80% i ae Bere (29) Zeyheri. 
Lys. alternate, pinnatifid or runcinate: 
Lys. membranous, the lower on spine-bor- 
dered petioles, runcinato- pinnatifid, lobes 
3 pair, broad, with very small, weak marg. 
BPiNes «+s oe mes ees see cee ows (30) SOnChifolia. - 
Lys. rigid, gland-pubescent, concolourous : 
Rad. lvs. 12-18 in. long, petioled, 
glandular on both sides ... ... «... (31) grandifolia. 
Rad. lvs. sessile? glabrous beneath ... (32) Viscosa. 
Lys. rigid, white-woolly beneath, softly 
pubescent above «.. «1. ss. ++ eee (33) Duphthalmoides 
Lvs. opposite! connate, glabrous, roundish-oblong, 
RI ogee SS ee wee. see ~ owe (36). Oppomitliodls, 
Heads discoid : 
Leaves concolourous, glabrous or nearly so : 
Glaucous, quite glabrous ; lvs. cordate at 
base, acuminate, many nerved, tipped and 
margined with long spines ... «. «+. (35) cruciata. 
Not glaucous: subglabrous or puberulous: 
Upper surface of lys. glabrous; lvs. 
cordate, clasping at base, netted- 
veined, acuminate; stem compressed (36) glabrata. 
Upper surface of lvs. spinellose; lvs. : : 
pinnatifid ... ... ss. see so» «es (37) pinnatifida. 
Leaves woolly or cottony beneath (or on both sides) : 
Lvs. cordate-acuminate, spine-lobed at base (36) glabrata, 8. 
Lys. more or less deeply pinnatifid: : 
Cauline lvs.subpetiolate, broadly-oblong, 
inciso-pinnatifid, white beneath, lobes 
oblong-lanceolate ; iny. sc. shorter 
SHAN Cine 5. <c.> ss 5. s.- * s.-- (38) seminivea. 
Lvs. sessile, pinnatipartite, with narrow lobes and revolute 
margins: 
Lys. simply pinnatipartite, lobes 
lance-subulate .. ... ... +» (39) rigida. 
Lvs. pinnatipartite, lobes deeply 
cut or pinnatifid ... ... ... (40) bipinnatifida. 
Rad. lys. short petioled ; cauline clasp- 
ing, sinuate-pinnatifid and undulate: 
3 Stem and leaves copiously woolly- 
canescent ... ... «+ ses +» (41) heterophylla. 
Stem-subglabrous ; lvs. glabrous or é 
thinly hoary beneath ... ... (42) atractyloides. 
Rad. lvs. long petioled; cauline }-clasp- 
ing, pinnatifid, the segments 2-lobed, 
white beneath ...  ...  .s. seo vee (43) Diloba.- 
Sect. 1. Apunera (Sp. 1-21). : : 
1, S. glabriuscula (DC. 1. c. 519); stem herbaceous, erect, striate, 
thinly pilose below, cobwebbed toward the summit; leaves on both 
sides glabrous or nearly so, deeply pinnatifid, the lobes roundish, tooth- 
lobed, set with long spines, the interspaces ciliato-spinellose, radical 
elongate, tapering to the base, cauline decurrent in long very spinous 
stem-wings, continued up to the head; inv. sc. longer than the disc, 
