HYDROPHYLLACE^. 153 



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

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

 with 5 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. 



H— Style 2-cleft, at least at the apex. 



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

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

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



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

 wise as Phacelia. 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 Nama. 



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. 



+- -4— 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 6-7-)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. NAME2E. Styles 2, distinct to the base ; their tips or stigmas commonly 

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

 sule loculicidal ; 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 Conanlhus 

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



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

 dilated or bilamellar. 



1 1. 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 cordate-didymous. Stigmas small. Capsule membranaceous, 2- 

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



* # Ovules and seeds numerous or several, on transverse lamelliform placentas, which 

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

 cence and are borne on the 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 

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

 suffrutescent. 



13. ERIODICTYON. Corolla funnelform or approaching campanulate. Filaments and 

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

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

 dilated placentas, and partly open on the other. Seeds rather few, pendulous. Shrubby, 

 with leaves mostly dentate. 



Tribe IV. HYDROLEEiE. Ovary and capsule completely 2-celled, and with large 

 and fleshy inseparable placentae; the dehiscence septicidally septifragal, or often 



