156 TETRADYNAMIA— SILICULOSA. Subularia. 



1 . V. annua. Annual Cress-rocket. 

 Leaves doubly pinnatifid. Pouches deflexed. 



V. annua. Linn. Sp. PL 895. fVilld. v. 3. 422. Fl.Br.675. Engl. 



Bot.v. 21. t. 1442. 

 Nasturtium sylvestre, Erucse affine. Bauh. Pin. 105. Rnii Syn. 



304. Mom. J). 2.301. secf. 3. t. 19./. 8. 

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



920./. 

 N. sylvestre Clusii. Dalech. Hist. 657. f. 

 Eruca nasturtio cognata tenuifolia. Ger. Em. 247 .f. Lob. Ic. 



205. f. 

 Valencia Cress. Petiv. H. Brit. t. 50./. 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 high. 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. Lain, t.556. 



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

 cave, uniform. Pei. 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. 



