Bicoma.} lxxtii. composite (oliver and hikrn). 443 



Outer pappus setaceous, inner paleaceous. Root annual . . 1. D. tomentosa. 

 Pappus all setaceous. Root perennial. 



Setae of pappus barbellate. Habit diffuse 2. D. anomala. 



Setae of pappus plumose. Habit erect. 



Capitula pedicellate. Leaves with broad base .... 3. D. Kirkii. 



Capitula sessile. Leaves tapering at base 4. 2), sessiliflora. 



1. D. tomentosa, Gass. in Bull. Soc. Philom., Mart. 1818, Cot- 

 tony erect much branched or simple annual, with a shrubby habit, 

 6-24 in. high. Branches terete. Leaves narrowly elliptical or spathn- 

 late, apiculate, obsoletely denticulate, narrowed to subsessile base, 

 ^2^ in. long. Capitula numerous, campanulate, about 14-flowered, 

 on very short axillary branches and terminal, ^-f in. long, discoid, 

 homogamous. Involncral bracts lanceolate tapering into apical spines, 

 arachnoid or cottony outside, the inner suberect, the outer shorter 

 spreading. Corolla white or pale yellow. Achenes densely silky. 

 Pappus duplex ; outer of barbellate setse 2-3 times the length of the 

 achene, tawny, biseriate ; the inner row of rather widely scarious aris- 

 tate-acuminate palese, nearly as long as the outer. — DC. Prodr. vii. p. 

 36 ; A. Rich. Fl. Abyss, i. p. 459; D. lanuginosa, DC. I.e. cum syn. ; 

 Schaffnera carduoideSj Schultz Bip. in Herb. Kotsch. Nubico, n. 100. 



Upper Guinea. Senegambia, Perrottet, Leprieur 1 Niger, Barter ! 

 Worth Central. Kouka, E. Vogel. 



Wtle ILand. Cordofan, Kotschy ! Cienkowsky, Abyssinia, Schimper! HUde- 

 hrandt ! 



DSozamb. Dlstr. Kaimba Island, opposite Tette, Kirk ! Bios de Sena, Peters ! 

 Widely spread in the East Indies. 



2. D. anomala, Bond, in Linnma, xxiii. p. 71 (1850). Rigid, 

 much branched diffuse perennial, 3-12 in. high. Rootstock woody. 

 Branches suffruticose, angular above, ashy, obsoletely pubescent, leafy. 

 Leaves linear or very narrowly oval, narrowed at both ends, sessile, 

 glabrescent above, hoary-tomentose beneath, 1-nerved, minutely serru- 

 late, ^2^ in. long. Capitula sessile, termiral, discoid, homogamous, 

 narrowly to broadly campanulate, |-f in. long. Involucral bracts in 

 many imbricating rows, glabrous or obsoletely cottony, very narrowly 

 lanceolate, gradually tapering into a pungent tip ; outer ones succes- 

 sively shorter and often more spreading. Flowers purple or white. 

 Achenes densely setose. Pappus pluriseriate, about 4 times the length 

 of the achene, of barbellate setae, very narrowly paleaceous at base. — 

 Harv. et Sond. Fl. Cap. iii. p. 517. 



Form 1 . Sonderi, Harv. Leaves narrowly linear. Heads rather large. 



Soutb Central? South African Gold Fields, Baines! 



Form 2. microcephala, Harv. (2>. Gerrardi, Harv.). Leaves narrowly linear. 

 Heads rather large. 



South Central t South African Gold Field, Baines ! 



Form 3. karaguensis, 0. & H. D. karaguensis, Oliv. in Trans. Linn. Soc. Lond. 

 xxix. 103, t. 70. Leaves narrowly oval. Involucral bracts suberect. Heads rather 

 large. 



irile ]Land. Karagu^, Speke and Grant ! 



Occurs also in Eastern districts of the Cape Flora. 



