140 LXllI. L'MBELLlFEll^. 



10. SIUM, Linn. 



Calyx-margin 5-tootheil or obsolete. Petals obcordate, with 

 an in Hexed point. Stylopod depressed or shortly conical. 

 Fruit laterally compressed, subdidymous ; carpels with 5 fili- 

 form, equal, obtuse ridges ; furroAvs and commissure both with 

 many vittie ; carpophore 2-parted. Seed subterete. — Fl. Cap. 

 ii.j^.^539. 



Mostly aquatic or marsh plants. — S. Thunbergii, DC, our only species, 

 has pinnate leaves, the leaflets ovate, acute, serrate, and stalked lateral 

 or terminal umbels ; involucre and involucels many-leaved. Flowers white. 

 Found in Western and Eastern districts and at Natal. 



11. RHYTICARPUS, Sond. 



Calyx-margin 5-toothed. Petals obovate, entire, involute, 

 apex acute or acuminate. Pruit roundish, laterally compressed, 

 crowned with the conical stylopod and short styles ; carpels 

 rugose, with 5 filiform ridges, the lateral, marginal ; furrows 

 1-vittate ; commissure 2-vittate ; carpophore 2-parted. Seeds 

 convex. — Fl. Cap. ii. p. 540. 



Glabrous perennials. Stem erect, glaucous ; petioles 3-parted ; leaves 

 pinnatisect, lobes cuneate or subulate. Flowers yellow. Involucre and 

 involucels many -leaved. — 2 species. 



12. BUPLEURUM, Linn. 



Calyx-margin obsolete. Petals roundish, entire, with an 

 involute, broad, obtuse point. Emit laterally compressed or 

 somewhat didymous, crowned wdth the depressed stylopod ; 

 carpels with 5 acute, wanged, filiform or obsolete ridges, the 

 lateral marginal ; furrows wath or without vittge, smooth or 

 granulate. — Fl. Cap. ii. p. 541. 



Herbaceous or shrubby glabrous plants. Leaves' usually quite entu-e. — 

 2 Cape specirs : B. Mundtii, a herb with linear-subulate, nerved leaves ; 

 and B. dijforme, a shrub with filiform, rush-like leaves. The former is 

 Eastern, the latter dispersed. 



13. HETEROMORPHA, Ch. and Schl. 



Calyx-margin 5-toothed. Petals roundish, entire, involute, 

 the apex broad, retuse. Fruit obovate-pyriform, 3-w^inged ; 

 carpels unequal, of two forms, the outer one 2-winged, the 

 inner one 3-winged, w^ngs decurrent from the calyx-teeth ; 

 furrows 1-vittate; commissure 2-vittate. — Fl. Cap. \i. p. 542. 



H. arborescens is a glabrous shrub, very variable in foliage. Leaves 

 petioled, ovate or oblong, either quite entire, or 3-lobed, 3-parted or 3-folio- 

 late. Umbels many-rayed. Involucels many-leaved. Flowers yellow. — 

 Eastern district and Katal. 



