Dilophia.] x. CRUCIFER^:. (Hook. f. & T. Anderson.) 161 



white, in densely contracted sessile subumbellate racemes. Sepals spreading, 

 equal at the base. Petals spathulate, retuse or toothed. Pods very short com- 

 pressed on the 4 sides, obcordate ; valves gibbous at the back, with a double 

 crest ; septum broad, perforated, ultimately disappearing. Seeds 2-4 in each 

 ceil, oblong, wingless, on short thickened cords ; cotyledons incumbent. 



1. D. salsa, Tfioms. in Hook. Kew Journ. Bot. v. 20, and iv. t. 12. 



In salt marshes in WESTERN TIBET, alt. 12-17,000 ft. DISTRIB. Tian Schan Mts. 



Boot simple, giving off many stout spreading stems at the crown. Sepals and petals 

 persisting round the opening pods. Specimens collected by Baron Von OEsten Sacken 

 in the Tian Schan Mts., and which Ruprecht described in his Sertum Tianshanicum, 

 differ but slightly from the Tibetan ones. 



31. MEGACARP2EA, DC. 



Large coarse perennial herbs, with a thick fleshy root and stem, and large 

 2-pinnate radical leaves. Flowers racemed or subcorymbpse, white or violet 

 coloured. Sepals equal at the base. Petals oblong, entire. Stamens 6 or 

 numerous, filaments not toothed. Pods large, indehiscent, didymous, much 

 flattened at the sides ; valves orbicular, broadly winged ; stigma sessile. 

 Seeds large, solitary in each cell, much flattened, not winged ; cotyledons 

 accumbent. DISTRIB. Species 3, 2 Tibetan the 3rd Caspian. 



1. IH. polyandra, Benih. in Hook. Kew Journ. Bot. 1855, vii. 356, t. 7 ; 

 leaf-segments incised and toothed, stamens 10-16, pods notched at the 

 base and tip, lobes orbicular. H.f. & T. in Journ. Linn. Soc. v. 176. 



WESTERN TIBET; Balti, alt. 10,500 ft., Winterbottom ; Western Himalaya, KUMAON, 

 alt. 12,000 ft., StracJiey & Winterbottom. 



Boot as thick as the wrist, annulate. Stem 1-2 ft., as thick as the thumb below, 

 branched above. Leaves 12 ft., a span broad ; segments very irregular, sharply 

 toothed. Inflorescence much branched, puberalous ; flowers cup-shaped, ^ in. diam., 

 shorter than their pedicels, white. Filaments stout, fleshy, subulate. Ovary broadly 

 obovate, base dilated into the fleshy lobed disk ; stigma, entire, discoid. .Pod 2 in. 

 diam., wings nearly as broad as the cell, veined. Seed reniform. 



2. BX. bifida, Benth. I.e. 357 ; leaf-segments lanceolate quite entire, sta- 

 mens 7-11, pods deeply 2-lobed, lobes obovate at length conniving. H. f. 

 & T. in Journ. Linn. Soc. v. 176. 



WESTERN TIBET, in the Kishengunga valley, alt. 7400 ft., Winterbottom ; Deotsu, 

 Falconer. 



Stem 12-18 in., stout, stiff, erect. Leaves with decurrent quite entire lobes 2-3 in. 

 long, acute or acuminate. Pods 2-3 in. diam., lobes broadly obliquely obovate, sinus 

 acute, wings equalling f of the cell. Specimens very imperfect, Winterbottom has 

 only a fragment of a leaf well preserved, with quite entire lobes. Falconer's specimens 

 are so shrivelled as to be hardly recognizable, and the accompanying leaves, which are 

 toothed, probably belong to M. polyandra. 



32. THX.ASFX, Linn. 



Annual or perennial herbs. Leaves entire or toothed, the upper often 

 clasping the stem. Flouters racemose, small, white or rarely pale rose. 

 Sepals small, erect, equal at the base. Petals equal or nearly so. Pod orbi- 

 cular obovate or obcordate, laterally compressed, emarginate, rarely acute ; 

 valves boat-shaped, keeled or broadly winged ; septum narrow, membranous, 



VOL. I. M 



