ss 



CRUCIFERiE. (MUSTARD FAMILY.) 



Fig. 14. 



Fig. 14. (a) Flower of Mustard, enlarged, (b) The tetradynamous stamens, also 

 enlarged, (c) Siliques of Arabis turrita, L., one of them with the valve gone, showing the 

 seeds suspended from the marginal placentas, (d) A seed cut crosswise, much enlarged, 

 showing the accumbent cotyledons, and the wing around the seed, (e) The embrj'o, showing 

 the accumbent cotyledons. (/) A flower of Matihiola, (§■) Its tetradynamous stamens, en- 

 larged, (h) A raceme of Erophila. (i) A silicle of the same, cut across, showing the partition, 

 and seeds suspended from marginal placentae. ( ; ) One of th« seeds cut across, much 

 enlarged, showing the incumbent cotyledons. 



Suborder I. SIIiIQ,UOS-^, Pods siliques, linear, or oblong (except in Anastatica 

 11, Savignya 24, and Carrichtera 25), dehiscent for their whole length, or all except the ape.T 

 (except in Andreoskia). Valves parallel to septum, and equalling it in breadth. 



Tribe I. AR AHIHF'-^. Peeds orbicular or oval, in one row (except inNasturtimri 

 3, Nasturtiopsis 4, and Arabis 6). Cotyledons accumbent (in Nasturtiopsis 4, incumbent). 



* JVot desert plants, 



]. xMATTHIOLA. 2^0 Woolly herbs. Flowers pinkish-purple, yellow, or livid. Pods 



flattened, often 2-horned. 



■2. CHEIPvANTHUS. If Canescent, shrubby plants. Flowers large, yellow. Pods4-anglcd. 



3. NASTURTIUM. ^ Glabrous or glabrescent herbs. Flowers white or yellow. Pods 



linear or oblong, turgid. Seeds in 2 rows. 

 o. BAEBAKEA. 2f (D Glabrous herbs; stems 4-angled. Flowers yellow. Pods 4-angled. 



6. ARABIS. 2f @ Herbs, usually pubescent; radical leaves spathulate. Flowers white, 



pink, or yellow. Pods linear, flattened, 1-nerved. Seeds sometimes in 2 rows, 



7. CAEDAMINE. Glabrous herbs. Flowers white. Pods flattened. Nerves 0. 



9. ANDREOSKIA. Glabrous herbs. Flowers white. Pods linear, keeled, 2-horncd. 



* * Dese7-t plants, or plants of Jordan Valley. 



4. NASTUETIOPSIS, Green herbs. Flowers yellow. Pods short, cylindrical, turgid. 



8. MOEETTIA. 2^ Prostrate, stellatc-tomentose herbs. Flowers whitish-pink. Pods 



oblong, terete. 



10. NOTOCERAS. Dwarf, appressed-canescent herbs. Flowers minute, white. Pods 



oblong, keeled, 2-horned. 



