160 37. TJMBELLIFEE^). 



3. PARXAS'SIA Linn. 



1. P. pains' tris (L.); petal-like scales 9 13, pet. with a 

 short claw, radical 1. cordate stalked, st.-l. clasping. JE.J3.82. 

 Pet. white, veined. Glands of the scales yellow. L. mostly 

 radical. St. 8 10 in. high. Wet and boggy ground. P. VIII. 

 X. E. S. I. 



B. Petals and stamens epigynous, inserted round an epigynous 

 disk. Cal. -tube adnate to the ovary. 



Order XXXVII. UMBELLIFER^S. 



Cal. 5-toothed or entire, adherent to the ovary, limb often 

 scarcely visible. Pet. 5, usually flexed at the point. Stam. 

 5, inserted with the pet. round the stylopode. Ovary 2-celled, 

 crowned with a double fleshy disk (st} 7 lopode). Styles 2. Fr. 

 consisting of 2 carpels (mericarps) adhering by their face (com- 

 missure) to a common axis from which they ultimately separate 

 and become pendulous. Seed solitary, pendulous. Albumen 

 horny. Inflorescence umbellate. Estivation i lubricate, except 

 in Hydrocotyle and Crithmum. Each carpel has 5 primary, and 

 often 4 intermediate secondary ridges ; and in the substance of 

 the pericarp are usually linear receptacles of oil (vittse or stripes) 

 under the ridges or the spaces between them. These parts are 

 sometimes either wanting or only slightly apparent. The 

 stripes are " solitary " when there is only one in each space be- 

 tween the primary ridges, and " 2, 3, &c. together " when 2, 3, 

 or more occur in each space. They and the ridges are best seen 

 by making a horizontal section of the fruit. 



Suborder I. ORTHOSPERM^E. 

 Sutural side of seed flat. Umbels various. 

 .* Umbels imperfect or simple'; no fr. -stripes. "No carpophore." 



Tribe I. HYDROCOTYLE^. Fr. laterally flattened, its 

 back even or acute. Umbel irregular or imperfect. 



1. HYDROCOTYLE. Cal. 1 inconspicuous. Pet. ovate entire. 

 Fr. of 2 flat nearly orbicular carpels, each with 5 filiform 

 ridges, of which the dorsal and 2 lateral are often inconspi- 

 cuous ; the 2 others arched. Stripes 0. Commissure linear. 



1 By calyx, throughout this Order, the free margin is intended. 



