TX. CliUCIFER.T. 33 



7. SENEBIERA, Poir. 



Annual or biennial, branched herbs. Leaves alternate, entire or pin- 

 natisect. Flowers in shoi-t, leaf-opposed racemes, minute, white (rarely 

 purple), sometimes apetalous. Sepals short, spreading, equal at the 

 base. Stamens free, not toothed, small, sometimes 0. Pod short, 

 didymous, laterally compressed, indehiscent ; valves subglobose, rugose 

 or crested ; style short or 0. Seeds 1 in each cell ; cotyledons indupli- 

 cate, gradually narrowed into the incumbent radicle. — Distrib. Tem- 

 perate and warm regions of both hemispheres ; species 6, 



1. Senebiera pinnatifida, DO. Mem. Soc. Hist. Par. (1799) p. 144, 

 t. 9. An annual herb, 6-18 in. high, diffuse or procumbent, much- 

 branched from the base ; branches glabrescent or with scattered, white 

 hairs. Leaves somewhat fleshy, glabrous or sparsely pubescent : radical 

 leaves 2-4 in. long, pinnate, the pinnae 6-10 pairs, inciso-dentate ; 

 cauline leaves |-1 in. long, pinnatisect or pinnatifid, the segments 3-7, 

 inciso-dentate, I by l in,, the ultimate segments oblanceolate, entire, 

 shortly mucronate. Flowers J^ in. across, in leaf-opposed corymbs, 

 at first sessile, afterwards racemose. Sepals ovate, obtuse. Petals 

 often absent, when present white, as long as the sepals, linear or 

 spathulate. Stamens usually 2 bearing anthers, with 4 filaments (?) 

 not bearing anthers 1 at each side of a perfect stamen ; filaments 

 subulate ; anthers globose, didymous. Fruiting racemes 1-2 in, long ; 

 pods y'^ in. long by -^-^ in. broad, didymous, compressed, notched about 

 equally at the base and apex, reticulato-rugose ; fruiting pedicels very 

 slender, g-y^ in. long, often slightly hairy. Seeds yellowish-brown, 

 reniform, minutely puuctulate. — Flowers : Feb. JSTot in Fl. B. I. ; Sprague 

 & Gray, Gen, PI. U. States, v. 1, t. 72. Senebiera didyma, Woodr. in 

 Journ."Bomb. Nat. v. 11 (1897) p. 122. 



SiND : Ruk Junction on the Railway Line in Upper Sind, Cooke I, Woodrow. — 

 DisTKiB. Temperate S. America. 



8. THLASPI, Linn. 



Annual or perennial herbs, usually glabrous. Radical leaves rosulate; 

 cauline oblong hastate, auricled. Flowers racemose, ebracteate, white 

 or rosy. Sepals erect, equal at the base. Petals obovate. Pod short, 

 orbicular, obovate or obcordate, laterally compressed, emarginate : valves 

 keeled or winged ; septum narrow, membranous ; style short or long ; 

 stigma emarginate. Seeds 2 (rarely more), in each cell, not winged ; 

 radicle accumbent. — Distrib. Europe, Asia, N. America ; species 30. 



1. Thlaspi arvense, Linn. Sp. PI. (1753) p. 646. A glabrous 

 herb, 6-18 in. high, often corymbos'^ly branched ; stems striate. Leaves : 

 the lower up to 4 in. long, oblong-obovate, obtuse, sinuate-dentate or 

 entire, much attenuated at the base ; the upper amplexicaul, with acute 

 diverging auricles, oblong, acute or obtuse, toothed or rarely entire. 

 Flowers i in. across, in dense, corymbose racemes, afterwards elongating. 

 Sepals oblong, obtuse. Petals spathulate, half as long again as the 

 sepals, truncate or slightly emarginate at the apex. Fruiting raceme 

 long; pedicels | -| in. long, spreading. Pods flat, |-| in. in diam. 

 including the wing, or |-| by | excluding it, suborbicular, obcordate, 

 with a deep sinus at the apex ; wing gradually increasing in width from 



D 



