284 Keij to the System of 



1293. Fruit ending in two small horn-like excrescences. 



Finally rather tall ; leaves very rigid, pungently straight- 

 pointed, beneath with an imperfect furrow ; umbels 

 axillary, almost sessile ; stalklets and often also the young 

 branchlets beset with shining hairlets ; petals whitish or 

 somewhat pink, glabrous ; fruit comparatively large, 

 very turgid, wrinkled-rough, suddenly compressed from 

 near the summit. (H. acicularis.) H. sericea. 



Fruit almost or quite blunt. 



Leaves much elongated, thinly filiform, rather lax, con- 

 spicuously pointed, underneath with a slight longitudinal 

 furrow ; umbels axillary, few-flowered, almost glabrous ; 

 flowers quite small ; fruit comparatively large, nearly 

 ovate, very turgid, outside densely verrucular-rough, 

 except at the much compressed summit. 



H. Macraeaua. 



1294. Leaves dissimilar in form. 



Seldom tall ; leaves from compressed -filiform to trigonous- 

 linear or the lower flattened to elongate-lanceolar, all 

 pointed ; umbels axillary, solitary, sessile, glabrous ; 

 flowers quite small ; fruit oblique-ovate, turgid, simply 

 acute, almost smooth. (H. flexilis.) H. ulicina. 



Leaves all similar in form ... ... ... ... 1295 



1295. Fruit pungently straight-pointed. 



Leaves generally rather short, spreading, pungent-pointed ; 

 umbels axillary, sessile, few-flowered ; petals outside in- 

 vested with short hairlets ; fruit comparatively slender, 

 beset across the middle with acute excrescences. 



H. pugioniformis. 



Upper portion of fruit much recurved 1296 



1296. Fruit comparatively large. 



Seldom tall ; leaves comparatively long, filiform, pungently 

 straight -pointed ; umbels axillary, sessile ; flowers small ; 

 petals outside beset with appressed greyish shining hair- 

 lets ; fruit wrinkled-rough, somewhat turgescent at the 

 base, -closely recurved in its upper gradually much 

 attenuated portion. Figure 71. H. rostrata. 



Fruit comparatively small. 



Never tall ; leaves comparatively short, spreading, filiform, 

 pungently straight-pointed ; umbels axillary, sessile, 

 few-flowered ; petals outside beset with appressed greyish 

 shining hairlets ; fruit wrinkled-rough, its reflexed pro- 

 longation formed by the much enlarged hardened and 

 finally split style. H. rugosa. 



