HYDROPHYLLACE^. 153 



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



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

 with 5 short lobes, not api)endaged within. Stamens unequal and somewhat unequally 

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

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

 Capsule globosc-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-lobes all similar or nearly so. Corolla deciduous, not yellow. 

 Stamens equally inserted low down on the corolla. Liflorescence scorpioid. (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 PhareUa. Seeds several. 



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

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

 Stigmas Vapitcllate. Seeds with a thin smoothisli testa, 10 to 20. Flowers solitary and 

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



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. 



-1- ■\— Style and even the stigma entire : ovary glabrous. 



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

 panulate ; the stamens in.serted on tlie liase of its tube, unequal. Style filiform : stigma 

 small. Liflorescence scapiform, loosely racemose. Leaves rountl-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 ; tlie stamens inserted on the 

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



Tribe III. NAME.E. Styles 2, di-stinct to the base ; their tips or stigmas commonly 

 clavate-thickeued 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 albmnen. Corolla imbricated in the bud, 

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

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

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



* "Ovules and seeds only 2 in each cell, one above tlie other : placentae not transversely 

 dilated or bilamcllar. 



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

 subulate : the former equally inserted, abru])tly dilated or as it were appendiculate at tlie 

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

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



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

 approxiiiiate or cohere in the axis of the ovary, but separate in tlie loculicidal dehis- 

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



12. NAMA. Corolla funnclform or somewliat salverform. Filaments and styles filiform, 

 mort! or less included; the former comiiionl}' unequal and ofien unequally inserted, 

 sliglitly and gradually if at all dilated at base. Capsule membninaceous ; the valves and 

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

 suffrutescent. 



13. ERIODICTYON. Corolla funnclform 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 tlie widely 

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

 with leaves mostly dentate. 



Tribe TV. HYDROLEE^E. Ovary and capsule completely 2-celled, and with large 

 and fleshy inseparable placentae; the dehiscence septicidally septii'ragal, or often 



