Leptothamnus. | COMPOSIT& ( Harv.) 111 
Sub-Tribe 2 BaccHaRIDEZ Heads (in the S. African genera) heterogamous, the 
oe rar ee flowers pluriseriate, with filiform corollas, Anthers without tails. 
en. 25-28). 
XXV. LEPTOTHAMNUS, DC. 
Heads many-fi., heterogamous ; ray-f.. filiform, truncate or bi-dentate, 
female, in one row; disc-fl. tubular, hermaphrodite, 5-toothed. Recept. 
flat, naked, somewhat honeycombed. Jnvol. scales imbricate, acuminate, 
in few rows. Style of ray bifid, with subulate branches ; of the disc 
bifid, with flattened branches, and compressed, conical, pubescent 
stigmas. Pappus bristle-shaped, deciduous, of the ray uniseriate, of 
the dise sub-biseriate (?) or at least more copious. Achenes obovate- 
oblong, compressed, silky (of ray and disc both ovuliferous). DC. Prod. 
5) 397. 
Slender suffrutices. Leaves scattered, linear-subulate, prominently nerved below, 
rigidly ciliate. Branches ending in simple, t-headed peduncles, Flowers yellow, 
turning red above. Name from Aemros, slender, and @auvos, a shrub. 
Leaves closely-set, imbricating ... ... ... .. «+ «. « (1) ciliaris. 
Teavesfewand distant ... 0.0... s0- +0 eee vee eee (2) Yarifolius, 
1. L. ciliaris (DC. 1. c.) ; stems branched from the base ; leaves 
closely placed, ¢mbricating ; ray-flowers very slender, minutely bidentate. 
Burch. Cat. 1839 and 2512. 
Has. Beyond the Gariep at Klaarwater and Kosifontein, Burchell; Klipplaat R., 
Drege; Wolvekop, Burke § Zey.! Zulu-land, Miss Owen! (Herb. D., Hk., Sd.) 
Root very thick and woody ; many subsimple stems rising from the crown, 6-10 
inches high, erect. Leaves 3-6 lines long, 4 line wide, strongly ciliate, very erect 
and closely imbricating. Peduncles 1-2 inches long, minutely bristly. Inv. scales 
glabrous, linear-lanceolate, acute, bistriate. I find no difference in the achenes of 
dise and ray, both are silky. 
2. L. rarifolius (Turez. Bull. Mose. xxiv. 2,p.65); stems simple below, 
corymbose above, angular-striate; leaves few, distantly scattered, much 
shorter than the internodes; ray-fl. swb-ligulate, shortly bifid. Walp. An. 
5; P» 195- : 
Has. Magalisberg, Burke Zeyher! 802 (also 103). (Herb. Hk., D., Sd.) 
Root woody. Stems 15-18 inches high, simple from 4—6 inches above the base, 
then corymbose, with several long, erect branches. Leaves 1-14 inch apart, each 
leaf 4-6 lines long, close-pressed, less strongly ciliate than in L. ciliaris. 
XXVI. CONYZA, Less. 
Heads many-fi., heterogamous, all the fl. tubular; marginal fl. female, 
in many rows, with very slender, filiform, truncate or 2-3-toothed 
corollas; central few, male, tubular, 5-toothed. ecept. flat or convex, 
naked or fimbrilliferous. Znzol. scales in many rows. Anth. without 
tails. Achenes flattened, mostly glabrous, narrowed at base. Pappus 
uniseriate, of slender, scarcely rough bristles. DC. Prod. 5, p. 377. 
' Herbaceous or suffruticose plants, almost all from the Eastern hemisphere. Stems 
erect, terete, branched. ‘Leaves various, often toothed or incised. Heads peduncu- 
late, corymbose or panicled. Flowers yellow. Pappus rufescent. Differs from 
Nidorella by its filiform (not shortly ligulate) marginal flowers. Name from rwvey, 
a gnat; said to drive away gnats! 
