HYDROPHYLLACE^. 1-53 



• Leaves all opposite, entire : flowers cymose : style 2-cleft at the apex. 



4. DRAPERIA. Calyx-lobes or sepals narrow-linear, equal. Corolla tubular-funnelform, 

 with short lobes, not appendaged within. Stamens unequal and somewhat unequally 

 inserted low down on the tube of the corolla, included. Ovary 2-celled, with a pair of 

 collateral ovules pendulous from near the apex of each cell. Style long and filiform. 

 Capsule globose-didymous, membranaceous ; the thin semi-septa commonly adnate to each 

 valve, and the membranaceous central or placental portion falling with the four seeds. 



* * Leaves all or all but the lowest alternate : flowers cymose, scorpioid-racemose or 

 spicate, or rarely in the forks. 



■i~ Style 2-cleft, at least at the apex. 



5. PHACELIA. Calyx-lobos all similar or nearly so. Corolla deciduous, not yellow. 

 Stamens equally inserted low down on the corolla. Inflorescence soorpioid. (Ovules and 

 seeds when reduced to a pair collateral and nearly as long as the cell.) 



6. EMMENANTHE. Corolla (yellow or yellowish and campanulate) persistent ! Other- 

 wise as Phacella. Seeds several. 



7. CONANTHUS. Calyx-lobes all similar, narrow. Corolla deciduous, funnelform, not 

 appendaged ; the slender filaments unequally inserted more or less high up on its tube. 

 Stigmas capitellate. Seeds with a thin smoothish testa, 10 to 20. Flowers solitary and 

 subsessile in the leafy forks of the stem. Habit of Xamn. 



8. TRICARDIA. Calyx-lobes or sepals very dissimilar ; 3 outer large and cordate, 

 2 inner linear. Corolla broad-campanulate, deciduous. Stamens equally inserted on the 

 base of the corolla. Ovary glabrous : ovules and seeds about 8. Flowers racemose. 



■t- -i— Style and even the stigma entire : ovary glabrous. 



9. ROMANZOFFIA. Calyx-lobes or sepals similar. Corolla funnelform or almost cam- 

 panulate ; the stamens inserted on the base of its tube, unequal. Style filiform : stigma 

 small. Inflorescence scapiform, loosely racemose. Leaves round-reniform and crenate- 

 lobed. 



* * * Leaves (alternate) and 1-flowered peduncles all radical: style 2-cleft at apex. 



10. HESPEROCHIRON. Calyx 5-(rarely <>-7-)parted ; the lobes linear-lanceolate, occa- 

 sionally unequal. Corolla campanulate or rotate, deciduous ; the stamens inserted on the 

 base of its tube. Ovary pubescent. Leaves spatulate or oblong, entire. 



Tribe III. NAMEJE. Styles 2, distinct to the base ; their tips or stigmas commonly 

 clivate-thickened or capitate. Ovary completely or incompletely 2-celled. Cap- 

 sule locidicidal ; the valves bearing the (usually placentiferous) half-dissepiments 

 on their middle. Seeds with firm fleshy albumen. Corolla imbricated in the bud, 

 not appendaged within. Leaves simple, alternate, or sometimes imperfectly oppo- 

 site. (Closely connected with the foregoing tribe through Draperia and Conanthus 

 on the one hand, and Lemmonia on the other.) 



# Ovules and seeds only 2 in each cell, one above the other : placentae not transversely 

 dilated or bllamellar. 



11 . LEMMONIA. Corolla short-campanulate. Filaments and styles short and included, 

 subulate : the former equally inserted, abruptly dilated or as it were appendiculate at the 

 very base : anthers eordate-didymous. Stigmas small. Capsule membranaceous, 2- 

 valved. Seeds proportionally large, globular-obovate. Depressed annual. 



# * Ovules and seeds numerous or several, on transverse lamelliforni placenta", which 

 approximate or cohere in the axis of the ovary, but separate in the locuUcidal dehis- 

 cence and are borne on tlie half-dissepiments or half-valves of the capsule. 



12. NAMA. Corolla funnelform or somewhat salverform. Filaments and styles filiform, 

 more or less included ; the former commonly unequal and often unequally inserted, 

 slightly and gradually if at all dilated at base. Capsule membranaceous ; the valves and 

 placentae undivided. Ovules and usually the seeds numerous. Mainly low herbs or 

 sufirutescent. 



1 3. ERIODICTYON. Corolla funnelform or approaching campanulate. Filaments and 

 style more or less included. Capsule crustaceous, 4-valved, i. e. first loculicidal, then sep- 

 ticidal, thus splitting into 4 half-carpels, which are closed on one side, owing to the widely 

 dilated placentae, and partly open on the other. Seeds rather few, pendulous. Slu-uhby, 

 with leaves mostly dentate. 



Tkibe r\'. HYDROLEE.E. Ovary and capsule completely 2-celled. and with larcre 

 and fleshy inseparable placentse; the dehiscence septicidaUy septifragal, or often 



