60 VIII. CRUCiFER.f: (OLIVER). [Jrabis. 



Schimp. Abyss. A. albida, Stev. ; DC. Syst. Veg. ii. 217, and Eich. PI. 

 Abyss, i. 16. 



Nile Iiand. Abyssinia, in mountainous situations, Schimper ! Roth ! (at an elevation 

 of 10,000 ft., Petit, according to Richard). 



A common and widely spread species in Europe, N. Asia, and N. America, extending 

 within the Arctic Circle. A larger-flowered form has been distinguished as a species under 

 the name of A. albida, but it does not appear to have any claim to the distinction. 



5. CABDAMINE, Linn. ; Bentli. et Hook. f. Gen. PI. i. 70. 



Sepals equal. Petals clawed. Siliquas narrow-linear, compressed, usually 

 narrowed at each end, with plane valves destitute of a distinct nerve or midrib, 

 and membranous septum. Stigma simple or 2-lobed. Seeds in one series, 

 compressed, not winged. Eadicle accumbent. — Herbs glabrous or minutely 

 pubescent, often flaccid. Leaves pinnate, pinnatisect, 3-foliolate or undi- 

 vided. Flowers white or purplish, ebracteate. 



A considerable genus, of temperate, alpine, and Arctic regions. But one of the following 

 species {C. trichocarpa) is endemic, and it is closely allied to widely dispersed northern 

 species. 



Leaves 3-foliolate \. C. afncana. 



Leaves pinnate or piunatisect. 



Glabrous, 1 ft. or more. Flowers rather large, purplish. Broader 



leaflets petiolulate 2. C. pratensis. 



Sparsely pilose, 6-12 in. Flowers small, white. Leaf-segments 



unequally crenate-serrate. Siliquas pubescent 3. C. trichocarpa. 



Glabrous or sparsely pubescent, 3-12 in. Flowers small, white. 



Leaf- segment 3 broadly toothed or entire. SiUquas glabrous . . 4. C. hirsuta. 



1. C. africana, Linn.; DC. Syst. Veg. ii. 252. A decumbent or as- 

 cending, glabrous or minutely and thinly pubescent herb, often attaining 1 or 

 2 ft. Eadical and cauline leaves or rather long petioles ; leaflets more or 

 less ovate and irregularly dentate or crenate, acute acuminate or obtuse, 

 petiolulate. Eaceraes ebracteate. Flowers white. Siliquas erect or ascend- 

 ing, much exceeding the pedicels. 



Nile Iiand. Abyssinia, Q. Dillon (Richard), Br. Roth ? (specimens imperfect). 

 Var. pubescens, Hook. f. in Journ. Linn. Soc. vii. 182. 

 Upper Guinea. Fernando Po, 7500 ft., Mann ! 



The same plant occurs at the Cape, in the islands of the Indian Ocean, and in the south of 

 India. 



2. C. pratensis, Linn. ; DC. Syst. Veg. ii. 256. An erect herb. Leaves 

 pinnate or pinnatipartite ; segments obtuse, more or less ovate or rounded, 

 very shortly petiolulate, of the upper leaves naiTower. Eaceme corymbose 

 at first. Siliquas ascending, narrow-linear. — C.- ohliq^ua, Hochst. in PI. 

 Schimp. Abyss. ; Eich. PI. Abyss, i. 19. 



Nile Iiand. Abyssinia, by mountain streams, Schimper ! 



A common plant in Europe, extending through northern Asia and Arctic America. 



3. C. trichocarpa, Hochst. PI. Schimp.; Rich. Fl. Abyss, i. IS. An 

 erect, slender annual. Eadical leaves lyrate-pinnate, with about 3 pairs of 

 elliptical sessile or subsessile segments ; terminal segment considerably larger, 



