56 VIII. CRUCIFER^ (OLIVER). 



* Radicle accumbent. Siliqua not appendaged (in African species). 



Leaves entire or sinuate, hoary-tomentose. Flowers purplish . . 1. Matthiola. 



Leaves pinnate or pinnatisect. Valves of siliqua with or without a 



very slender midrib. Seeds usually biseriate 2. Nasturtium. 



Radi<»l leaves lyrate. Valves of siliqua prominently carinate. 



Seeds uniseriate 3. Barb ARE A. 



Leaves spathulate or oblanceolate, toothed. Valves of siliqua plane 



or carinate 4. Arabis. 



Leaves pinnate or 3-foliolate (in African species). Siliqua usually 

 slightly narrowed towards its extremities. Valves without a dis- 

 tinct midrib. Seeds uniseriate 5. Card amine. 



Leaves entire or toothed, llowers bracteate. Siliqua rigid, recurved 



above 6. Morettia. 



Leaves linear, entire, with appressed mediofixed hairs 7. Farsetia. 



Siligua with horn-like appendages or rounded auricles. 

 Leaves linear. Siliqua short with a pair of terminal horns . . . Notoceras 



(p. 61). 

 Lower leaves piuuatifid. Siliqua with a pair of horns at the base . Lonchophoea 



(p. 61). 

 * Radicle incumbent. Cotyledons plane. 



Leaves entire or pinnatifid. Siliqua narrow-linear; valves faintly 



3-nerved 8. Sisymbrium. 



Cotyledons tioice folded transversely Heliophila 



(p. 65> 

 Cotyledons conduplicate. 

 Radical leaves lyrate-pinnatifid. Siliqua linear, with costate valves. 



Style long or short. Seeds uniseriate 9. Brassica. 



Radical leaves lyrate or pinnatifid. Siliqua linear ; valves with a 



slender median nerve. Style short. Seeds subbiseriate . . .10. Diplotaxis. 

 Radical leaves pinnatifid. Siliqua linear-oblong, rather turgid j 



valves costate. Seeds biseriate 11. Eruca. 



Leaves entire amplexicaul or pinnatifid. Flowers rose .... Moricandia 



(p. 67). 

 Leaves linear, entire. Flowers purple. Seeds broadly winged . . Henophyton 



(p. 67). 

 B. Fruit short (not more than 3 times longer than broad) or broader 

 than long, dehiscing longitudinally. 



*Septum as broad as the valves. 

 Cotyledons plane^ radicle accumbent. 



Leaves linear, entire, with appressed hairs 7. Farsetia. 



Leaves oblong, petiolate. Silicule with a pair of concave auricles at 



the apex Anastatica 



(p. 61). 

 Cotyledons conduplicate. 



Silicule orbicular, compressed Savignya 



(p. 67). 



Silicule turgid with a foliaceous beak Carriciitera 



(p-67). 



* Septum narrow, transverse to the larger diameter of the fruit (silicules laterally compressed). 

 Radicle incumbent. Cotyledons plaue or conduplicate, 



Silicules elliptical, winged. Cotyledons conduplicate. 



Flowers purple ' . 12. Schouwia. 



Silicules obcordate-cuneate 13, *Capsella. 



Silicules oblong or subglobose, with convex valves (minute 



aquatic with linear radical leaves) 14. Subularia. 



