2 74 UmbellifeVCB. [Hydrocotyle. 



LXIIL— UMBELLIFER^. 



ANNUAL or perennial herbs, 1. alt, simple or compound, 

 without stip. (except in Hydrocotyle) but with petiole sheath- 

 ing ; fl. usually bisexual, often slightly irregular, in simple or 

 compound umbels ; cal.-tube adnate to ov., segm. 5 or o (so 

 that there seems to be no cal.); pet. 5, distinct, often bifid 

 with an inflexed apex, imbricate (sometimes valvate in Hydro- 

 cotyle); stam. 5, epigynous ; ov. inferior, crowned with large 

 epigynous disk, 2-celled with one pendulous ovule in each 

 cell, styles 2 ; fruit of 2 separable carp, (mericarps) attached 

 by summit to slender central axis, indehiscent, with 5 ridges 

 down back and sides and often with sunken oil cavities (vittse) 

 between them ; seed pendulous, with a small embryo in carti- 

 laginous endosperm. 



Fl. in heads or simple umbels 



Leaves entire 1. Hydrocotyle. 



Leaves palmatisect 2. Sanicula. 



Fl. in compound umbels 

 Fruit rounded or slightly compressed laterally 



Fl. yellow, 1. simple 3. Bupleurup.i. 



Fl. white 



Primary umbels with an involucre . . 4. Carum. 

 Primary umbels without an involucre . 5. PlMPlNELLA. 

 Fruit much dorsally compressed, flat 



Glabrous 6. Peucedanum. 



Hairy . . . ... . . .7. Heracleum. 



Only 10 species represent here this vast Order of temperate climates. 

 Of these, 6 are restricted to the hill country and 3 more extend into it, 

 Caricm stictocarfium being the only species confined to the low country. 



1. HYDROCOTYLE, L. 



Prostrate perennial herbs, rooting at the nodes, 1. orbicular 

 or reniform, with stip., fl. in very small heads or umbels opp. 

 the 1.; cal.-segm. minute or o; pet. entire, valvate or imbricate; 

 fruitTrather fleshy, laterally compressed, commissure narrow, 

 mericarps with the primary and sometimes the secondary ribs 

 visible, vittse o. — Sp. about 70; 5 in Fl. B. Ind. 



Stip. cauline ; carp, with primary ribs only 



L. 3-4 in.; peduncles clustered . . . .1. H. javanica. 



L. under 1 in.; peduncles solitary . . . 2. H. rotundifolia. 

 Stip petiolar ; carp, with both primary and se- 

 condary ribs 3. H. asiatica. 



