884 TEESDALIA— IBERIS. [CtASS XV. ORDER I. 



GENUS IX. TEESDA'LIA.— Brown. Teesdalia. 



Nat. Ord. Crucif'er*. Juss. 



Gen. Char. Silicula laterally compressed, roundish ovate, emar- 

 ginale, of tvpo cells, two seeded, valves keeled. Filaments with a 

 scale at the base. Cotyledons accumbent. — (e Fig. 1, page 871.) — 

 Named in honour of Mr. Robert Teesdale, F.L.S., a Yorkshire 

 Botanist, who died in 1804. 



I. T. nudicau'lis, Br. (Fig. 1020.) Naked-stalked Teesdale. Petals 

 unequal. 



English Flora, vol. iii. p. 170. — Hooker, British Flora, ed. 4. vol. i. 

 p. 247. —Teesdalia item.— Lindley, Synopsis, p. 28. — De Cand. Prod. 

 1, p. 178. — Iberis nudicaulis. — English Botany, t. 327. 



Root small, tapering. Stems mostly sereral, from two to four inches 

 high, the central one erect, simple, and naked, the others often spread- 

 ing, and with one or two leaves near the base, round, smooth, simple. 

 Leaves mostly numerous, spreading in a circle round the root, petiolate, 

 simple and ovate, or lyrato-pinnalifid, with obtuse lobes, smooth, except 

 the margin, which is mostly ciliated with fine hairs, dark green, chang- 

 ing to yellow and red. Infiorescence a terminal sub-corymbose raceme. 

 Flowers small, white. Calyx small, of four small ovate green or 

 purplish pieces. Corolla white, of two small ovate and two much 

 larger oblong spreading petals. Stamens nearly equal, filaments with 

 a small white petaloid scale near the base on the inner side. Anthers 

 of two roundish yellow lobes, i^rwii a laterally compressed silicula, 

 smooth, swollen on the under side, concave above, roundish ovate, 

 slightly notched, with a small sessile stigma between the rounded lobes, 

 acutely keeled, but not winged at the back, two celled, each cell con- 

 taining two small roundish compressed seeds. 



Habitat. — Sandy and gravelly banks and old walls in various parts 

 of the country, but not very common. 



Annual ; flowering in May and June. 



Besides our species only another of this genus is known, the J. 

 lepidium, which has the petals all equal. It is found in the South of 

 Europe, but is not a common plant. 



GENUS X. IBE'RIS.— Linn. Candy-iuft. 



Nat. Ord. CRUCiF'ERiE. Juss, 



Gen. Char. Silicula laterally compressed, roundish ovate, emar- 

 ginate, truncated, of two cells, one seeded, valves keeled and 

 winged. Petals unequal. Filaments simple. Seeds ovate, pen- 

 dulous. Cotyledons accumbent. — (c Fig. 1, page 871.) — Named 

 from Iberia, Spain,- in which country many species are found. 



