the genus crassocephalum 211 



Crassocephalorum Clavis. 



1. Flowering-heads arranged in a dense mass. 



a. Leaves pinnatifid, auricled at the base 1. C. subscandens, 



b. Leaves without auricles. 



a. Leaves deeply and closely toothed. 



Glabrous. Leaves with numerous lateral nerves 



2. C. multicorymbosum. 

 Hairy. Leaves with five pairs of lateral nerves 



3. C. butaguense. 

 /3. Leaves distantly toothed or lobed 4. G. biafrce. 



2. Flowering-heads more or less laxly arranged. 



a. Inflorescences axillary 5. C. Goetzenii. 



b. Inflorescences terminal. 



a. Involucral leaves united below 6. C. sarcobasis. 



(3. Involucral leaves free. 



'■' Leaves sessile and amplexicaul 7. C. amplexicaule. 

 '••■^ Lower leaves or all stalked. 



f Capitula cylindrical 8. C. crepidioides. 



If Capitula campanulate. 



Leaves oblong-lanceolate 9. C.picridifolium. 



Leaves ovate 10. C. viacr op appus. 



Iff Capitula broadly campanulate. 



Leaves with broad auricles. Achenes 



hairy 11. C. Ducis-Aprutii. 



Leaves with narrow auricles. 



Achenes glabrous .. 12. C. Behmianum. 



3. Heads usually solitary. 



a. Florets purple or blue. 



Involucral leaves 12 mm. long 13. C. rub ens. 



Involucral leaves 8 mm. long 14. G. Proschii. 



b. Florets yellow. 



Leaves ovate to lanceolate, toothed or lobed 



15. G. vitellinum. 

 Leaves narrowly oblong, entire 16. G.uvens. 



The synonymy is as follows : — 



1. C. SUBSCANDENS. Senecio subscandens Hochst. ex A. Eich. 



Tent. Fl. Abyss, i. 434 ; Oliver & Hiern in Fl. Trop. Afr. 

 iii. 421; Engler, Pflanzenw. o.-Afr. 0. 418; Hiern, Cat. 

 Welw. PI. i. 603. 



2. C. MULTICORYMBOSUM. Senecio corijmhosus Klatt in Ann. 



Naturh. Hofmus. Wien, vii. 103 ; Engler, I. c. C. 418. 



3. C. BUTAGUENSE. Senscio butaguensis Muschler in Herzog zu 



Meckl. Zent.-Afr. Exped. 403. 



4. C. BiAFR^. Senecio BiafrcB Oliver & Hiern, I.e. 420. S. Bojeri 



Hook, f, in Journ. Linn. Soc. vii. 202, non DC. 



5. C. Goetzenii. Senecio Goetzenii O. Hoffm. in v. Gotzen 



Durch Afr. 383 ; Muschler in Engler, Bot. Jahrb. xliii. 58. 



6. C. SARCOBASIS. Gynura sarcobasis DC. Prod. vi. 300; Engler, 



/. c. C. 416. 



7. C. AMPLEXICAULE. Gynura amplexicaulis Oliver & Hiern, /. c. 



403 ; Engler, I. c. C. 416. 



8. C. CREPIDIOIDES. Gynura crepidioides Benth. in Hook. Niger 



Fl. 438; Oliver & Hiern, Z. c. 403 ; Engler, I.e. C. 416. 

 G. polycephala Benth. I. c. 438. G. diversifolia Sch. Bip. 



Q 2 



