234 NATURAL HISTORY OF PLANTS. 



polygamous. Stylopods more or less dilated at base, sometimes 

 undulate. Fruit * oblong-linear, produced above to long or very long 

 beak,^ compressed contrary to septum ; carpophore simple or 2-fid. 

 Primary ridges subequal rather prominent, sometimes rather broad. 

 Vittse in furrows solitary, thin, obscure or 0. Face of seed deeply 

 sulcate ; margins generally involute. — Annuals, glabrous or pubescent ; 

 leaves pinnately decompound ; umbels compound or rarely simple ; 

 involucral bracts 1 (or 0) ; bracteoles of involucels oo , entire or 

 dissected. (North hemisph. of old worlds) 



72 ? Ottoa H. B. K.* — Flowers ' generally polygamous (nearly of 

 Scandix or Chcerophyllum), subasepalous ; petals oblong entire ; point 

 long inflexed. Styles elongate slender capitellate; stylopods depressed 

 conical. Fruit nearly of Chcerophyllum, oblong ; vittse in furrows 

 solitary; carpophore 2-partite. Face of seed concave sulcate. — A 

 glabrous perennial herb ; leaves^ terete fistular transversely septate.; 

 umbels compound; involucre and involucels 0.^ {Mexico, Columbia.^) 



V. HYDROCOTYLE^. 



73. Hydrocotyle T. — Flowers hermaphrodite or polygamous: 

 receptacle variously sacciform. Calyx small or 0, inserted at margin 

 of receptacle with 6 petals, entire concave, acute or obtuse, in prse- 

 floration valvate or imbricate (Gentella). Stamens 5, epigynous, 

 inserted under depressed disk. Germen inferior, 2-celled ; cells 

 1-ovulate. Fruit shortly ovate, suborbicular or 2-dymous, much 

 compressed contrary to septum, often constricted at commissure ; 

 carpophore simple or rarely 2-fid, sometimes 0. Primary ridges little 

 prominent or nervelike subequal ; dorsal marginate ; intermediate little 



1 The central fruit of the umbellules is of et Godr. M. de Fr. i. 740. — ^Walp. Sep. ii. 421 ; 

 different form in Cyolotaxis (Boras. Diagn. Or. v. 9C3 ; Ann. ii. 717, 718 {Cyclotaxis). 



X. 48 ; ser. 2, t. 101 ; Fl. Or. ii. 218). * Nov. &m. et 8p. v. 20, t. 423.— DC. ProOr. 



2 Prom char, of heak 2 sect, are distinguished : iv. 136. — Enel. Gen. n. 4417. — B. H. Qen. 899, 

 1. Peeten (Dlb. Sot. Gall. i. 240 ;— DC. Prodr. n. 75. 



221, sect. 1), beak ecostate and doraally com- ' " White." 



pressed ; 2. Wylia (Hoffm. Umh. i. 3, t. 2 ; — « Reduced to petal ? 



DC. loc. eit. sect. 2), heak Buhterete or laterally ? Perhaps better a sect, of Chmrophyllum, of 



compressed. singular habit (nearly the same as Crantzia, 



' Spec, about 9. Vent. Jard. Cels. t. 14. — to (Enanthe). 



Rbichb. p. Ic. Fl. Germ. t. 2029, 2030.— Sieth. s gpec. l. 0. cenanthoides H. B. "K.— (Enanthe 



Fl. Gicee. t. 285. — 'Boiss.Fl. Or. ii. 914.- GitEN. quitensis Spreng. Syst. i. 888. 



