Conyza. | LXXIII. COMPOSITE (OLIVER AND HIERN). 319 
147. O. Schimperi, Schultz Bip. in Pl. Schimp. Abyss. sect i. n. 124. 
C. absinthifolia, DC. Prodr. v. p. 383. CO. macrorrhiza, Schultz Bip. in 
Pl. Schimp. Abyss. sect. ii. n. 1104. H. macrorrhizus, Schultz Bip. in 
Schweinf. Fl. Athiop. 147. Cfr. CO. spathulifolia, Maxim. in Regel, 
Descr. Pl. Nov. ii. p. 18 (1874). 
North Central. Monbuttu-land, Schweinfurth ! 
Nile Land. Abyssinia, Schimper! Roth! Hildebrandt! 
Mozamb. Distr. Kilima-njaro, Rev. C. New! 
Extends to India. 
23. PSIADIA, Jacq.; Benth. et Hook. f. Gen. Pl. ii. p. 284. 
Capitula heterogamous radiate, ray-florets ? in” several series, 
disk-florets fewer staminate. Involucre campanulate, scales 0 -seriate, 
ovate to linear, outer smaller, imbricate. Receptacle naked. Corolla 
of ray ligulate, ligule small, entire or 2-3-dentate; of disk tubular 
5-toothed. Anther-base obtuse, 2-dentate. Achenes 3-6-costate, but 
slightly or not compressed, base narrowed callous; sete of pappus 
1-seriate.—Glabrous, often with more or less viscid extremities, (vil- 
lous or hirsute) shrubs. Leaves alternate, entire or toothed. Capitula 
small or of medium size, in terminal corymbs. Ray-florets yellow. 
A small genus chiefly confined to the Mascarene Islands. 
Nearly glabrous. Ligule small. 
Leaves lanceolate acuminate or cuspidate . . . . . 1. P. arabica. ; 
Leaves oval-oblong, obtuse, mucronate... . .. 2 P. dodoneefolia. 
Hoary tomentose. Ligule of the ray-florets conspicuous . 3. P. incana. 
1. P. arabica, Jaub. et Spach, Illustr. Plant. Orient. iv. p. 85, 
tt. 352, 353. A branched shrub ranging up to 6 ft. or more. Branchlets 
glandular-puberulous or glabrate. Leaves lanceolate, more or less 
acuminate or cuspidate, narrowed at the base into the petiole, entire 
or distantly serrulate, subcoriaceous, 2-3 in. long, the younger ones 
resinous-glistening and marked with minute glandular dots; margins 
undulate or flat; midrib depressed above, prominent beneath; lateral 
veins not conspicuous ; petiole ranging up to}in. Capitula 35-75- 
flowered, hemispherical, 1-4 in. diameter, on pedicels ranging up to 
2 1.,1n many-headed corymbose cymes, equalling or rather overtop- 
ping the leaves. Involucral scales 3-5-seriate, subcoriaceous, puberu- 
lous or glabrous, obtuse. Ligule small, entire or 2-3-dentate. Flowers 
yellow.—P, resiniflora, Schultz Bip. in Schweinf. Beitr. Fl. Aithiop. pp. 
286, 308; Nidorella punctulata, DC. Prodr. v. p. 323; P. punctulata, 
Vatke in Oesterr. Bot. Zeitsch. xxvii. 196 (1877). 
brant Zand. Abyssinia, Schimper! Hildebrandt! Beccart ; Somali-land, Hilde- 
Mozamb. Distr. Zanzibar, Kirk ! . 
th Occurs aiso among the mountains of Yemen in Tropical Arabia, and also among 
eas bestos Mountains in the Kalahari district of South Africa; it is very nearly 
“lated to, if not identical with, a species from Madagascar. 
P. dodonewefolia, Steetz in Peters Mossamb. Bot. p. 385. A 
Shrub. Branchlets short, leafy and slightly puberulous at the extre- 
Muties. Leaves oval-oblong, obtuse and mucronate at the apex, nar- 
Towed at the base into the petiole, entire, glabrous, 14-24 in. long, 
