lAvii. i-.\iiii;M.in;i{.r. 501 



oacli runiislu'd willi :ui involuorc ol' bracts or one or both naked. Calyx- 

 tiibo adiiate to tho ovary; teeth 5 or (so that there seems to be no 

 ealyx). Petals 5, cpigynous, distinct, sometimes unequal, oftiMi bifid, 

 with an inllexed a|)ex and an impressed midrib, indjricati; in buil (some- 

 times valvate in llydrocotijle). Stamens 5, epigynous, alternating with 

 the petals. Ovary inferior, 2-celIed, crowned by a large epigynous 

 usually 12-lobed disk : ovule solitary in each cell, pendulous ; styles 2, 

 often dilated at the base into siylopods which crown the ovary ; stigmas 

 n)inute, capitellate. l^'ruit of 2 indehiscent dorsally or laterally com- 

 ])ressed separable carpels {mericarps), separated by a commissure and 

 attached to and often pendulous from a slender central axis {carpophore). 

 The mericarps are usually marked by 5 longitudinal lines (primar>/ 

 ridges), 1 dorsal, 2 marginal and 2 intermediate, and often with 4 more 

 (secondanj rid(/cs) alternating with the primary ones ; pericarp often 

 traversed by oil-canals (vittce). Seed 1 in each carpel, pendulous from 

 the point of attachment to the carpophore ; testa thin ; albumen carti- 

 laginous ; embryo minute, straight, near the apex of the seed ; radicle 

 superior. — Uistrib. A large Order, abundant in temperate regions, 

 especially in the Northern hemisphere, but more or less represented 

 throughout the world ; genera 152 ; species 1300. 



rmbcls simple 1. IIvdrocotyle. 



VmbeMs coinpouncl. 



Fruit latci-;illy conipre?sed, not winged ; commissure narrow. 



J-caves quite entire, grass-like 2. Bupleuuim. 



Leaves pinnate or decompound (sometimes simple and 

 broadly ovate-cordate in PimpincUa). 



Ridges of fruit slender ; furrows 1-vittate 3. Caruji. 



Eidges of fruit slender ; furrows 2-3-vittate ; root 



usually fusiform 4. rniriNELL.v. 



Fruit somewhat dorsally compressed, not winged ; commis- 

 sure broad ; root tuberous 5. Polyzvgus. 



Fruit much dorsally compressed; lateral ridges winged. 

 Portion of the fruit between the margin and the seed 



Jiyaline G. Zosimia. 



Portion of the fruit between the margin and the seed 

 not hyaline. 



Herbs, usually glabrous ; petals not radiant ; ovary 



glabrous; wings of fruit with thin margins 7. Peucedanim. 



Herbs, usually hairy ; petals often radiant ; ovary 

 usually pubescent; wings of fruit thickened 

 at the margin S. Heracleum. 



1. HYDROCOTYLE, Linn. 



Annual or perennial herbs growing in moist places, usually prostrate 

 and creeping and rooting at the nodes. Leaves orbicular or reniform ; 

 stipules small, scarious, sometimes lacerate. Flowers (in the Indian 

 species) in very small heads or simple umbels, white or purplish, some- 

 times unisexual. Involucre-bracts few or 0. Calyx-teeth minute or 

 obsolete. Petals entire, valvate or imbricate. Fruit somewhat fleshy 

 laterally compressed ; commissure narrow ; mericarps with the primary 

 and sometimes the secondary ridges visible; vittte 0. Carpophore 0. 

 Seed laterally compressed. — Distkib. Temperate and tropical re^-ions 

 of the world, abundant in Australasia, S. Africa and S. America ; species 

 about 70. 



