156 TETRADYNAMIA— SILICULOSA. Subularia. 



1. V. annua. Annual Cress-rocket. 

 Leaves doubly pinnatifid. Pouches deflexed. 



V. annua. Linn. Sp. PI. 895. M'ilkl. v. 3, 422. FL Br. 675. Engl. 



Bot.v.2].t.l442. 

 Nasturtium sylvestre, Erucse affine. Baiih. Pin. 105. Raii Syn. 



304. Moris, u. 2. 301. sect.S.t. 19./. 8. 

 N. sylvestre valentinum. Clus, Hist. v. 2. 130./. Bauh. Hist, v, 2. 



920./. 

 N. sylvestre Clusii. Dalech. Hist. 657./. 

 Eruca nasturtio cognata tenuifolia. Ger. Em. 247. /. Loh. Ic. 



205./ 

 Valencia Cress. Petiv. H. Brit. t. 50. f. 5. 



In sandy fields, but very rarely. 



Found by Mr. Lawson, on Salisbury plain, not far from Stonehenge. 

 Ray. I have never heard of its being met with since. 



Annual. June. 



Root small, tapering. Stem erect, bushy, rough with deflexed 

 bristles, leafy, about a span liigh. Leaves scattered, doubly pin- 

 natifid, with linear, bluntish, decurrent segments. FL rather 

 small, pale yellow, with purplish veins. Pouch ribbed, bristly, 

 surmounted by the oval, curved, smooth, ribbed, rigid Style. 

 Seeds 4 in each cell ; M. DeCandolle remarks that they become 

 covered with a glutinous exudation, on being immersed in warm 

 water. The expanded cotyledons, remaining for some time on 

 the stem, are inversely heart-shaped, flat, quite smooth and 

 even. 



317. SUBULARIA. Awl-wort. 



Linn. Gen. 332. Juss. 240. H. Br. 676. Br. in Ait. H. Kew. v.4: 



91. DeCand. Syst.v.2.697. 

 Draba/3. Lam. t. 556. 



Cat. erect, equal at the base, deciduous ; leaves oval, con- 

 cave, uniform. Pet. obovate, entire, spreading ; their 

 claws shorter than the calyx. Filam. simple. Anth. of 

 2 round lobes. Germ, ovate, compressed. Style none. 

 Stigma flat, quite sessile. Pouch elliptic-oblong, com- 

 pressed transversely, entire, tipped with the stigma, of 2 

 cells ; valves deeply concave, boat-like, but not keeled ; 

 partition membranous, elliptical, parallel to the valves, 

 but crossing the narrowest diameter of the pouch. Seeds 

 ovate, 4 or more in each cell ; . cotyledons linear, incum- 

 bent. 



Only one species, a small aquatic herb. 



