CBUCIFEH.V. 



193 



sessile, or with a short or somewhat elongated stalk ; and its valves 

 thus constituted 1 are nearly flat. Brass, lea comprises about a hun- 

 dred species, 2 found in abundance in the temperate parts of Europe, 

 Asia, and North Africa. 



In the same sub-series we find six other genera ; Entca, Saviynya, 

 Euzomodendron, Henophyton, Moricandia, and Orychophraymus, which 

 only differ in unimportant characters from Brassica. 



II. RADISH SERIES. 



The Radishes 3 (Fr., Radis ; figs. 242, 243) have cruciferous flowers 

 with the four sepals somewhat unequal, the two lateral being slightly 

 saccate above the base, and four unguiculate petals. The stamens 

 are free tetradynamous, with entire filaments. The elongated ovary 

 is surmounted by a cylindrical style, with a concave stigmatiferous 

 head emarginate at the apex. At first the ovary is one-celled, with 

 two pluriovulate parietal placentas and a false septum, us in other 

 Crucifers. But the fruit, elongated or cylindro-conoidal, continuous or 

 moniliform, smooth or ribbed longitudinally, corky or spongy, is 

 indehiscent, with the placentas, septum, and inner layers of the peri- 

 carp hypertrophied to fill the cavity with a pith-like substance 

 excavated into alternate cells, which are separated from one another 

 by partitions of this substance, and contain a descending subglobular 

 seed, with a large fleshy embryo and conduplicate cotyledons. At 

 the bottom of the fruit is often a cell separated by a transverse arti- 

 culation, which is empty or contains a rudimentary seed. In R. Ra- 

 phanistrum* which is often made into a distinct genus, Eap/ianistrum, 5 

 there is moreover a transverse articulation between each seed (fig. 

 213), which is at maturity enclosed in a little achene-like joint, 



1. Euhrassica. 



2. Ei acasl rum. 



3. Hirsehfeldia. 

 Brassica/ 4. Melanusinapis. 



sect. 8. \ 5. Leucosinapis. 



6. Sinapistrwm. 



7. Diplotaxis. 

 , 8. Sinapidendron. 



- Walp., Rep., i. 184; ii. 763; Ann., i. 48 , 

 ii. 53; iv. 216; vii. 117. 

 VOL. III. 



3 Raphanus T., InsL, 229, t. 114.— L., Gen., 

 n. 8S2. — Adans., Fain, des PL, ii. 424. — J., 

 Gen., 23S.— O^eutn., Fruct., ii. 299, t. 143, fig. 

 5. — DC, Prodr., i. 228. — Spach, Suit, a Puffun, 

 vi. 333. — Endl., Gen., n. 4972. — Payer, 

 Organog., 212, t. 44.— B. H., Gen., 101, 968, n. 

 164. 



4 L., Spec, 935.— Gken. & Godr., Fl. de Fr., 

 i. 72. — R. Sylceslris Lame:. — Rapistrum arvense 

 All. 



5 R. Lampsana G^RTN., loc. cit., fig. 0. — R. 



O 



