298 WATEIiLEAF FAMILY. 



high, 9-21 mostly lanceolate and crowded leaflets, clusters of bright blue 

 flowers collected in a long panicle, and stamens and style longer than the 

 lobes of the corolla, which is 1' broad. 



5. COB^A. (Named for B. Cobo, a Spanish priest in Mexico, from 

 which country the common species was introduced into cultivation.) 21 



C. scdndens, Cav. Smooth, tall-climbing by its much-branching ten- 

 drils ; leaflets ovate ; dull purple or greenish corolla 2' or more long, long 

 filaments coiling spirally when old ; flowers all summer ; usually cult, as 

 an annual. 



LXXVII. HYDROPHYLLACEiE, WATEELEA.F FAMILY. 



Plants resembling the foregoing family, in the arrangement 

 of the flowers more commonly imitating the Borage Family ; 

 differing from both in the 1-celled ovary and pod with 2 parietal 

 placenta. In some, the placentae unite in the axis, making 

 a 2-celled ovary. Style 2-eleft or else 2 separate styles. 

 Ovules at least 2 to each placenta. Seeds with a small em- 

 bryo in hard albumen. Juic^e inert and watery. Leaves 

 mostly alternate, simple or componnd. 



» style 2 cleft ; oi-artj and pod \ celled, irith tiro pai-ietal plarenife. 

 *- Placentte flesh;/ and so broad that they line the ovary, and inclose the (mostly 4) 

 ovules and seeds ; corolla usually convolute in the hud, commonly ivith 5 or 10 

 folds, scales, or other appendages down the inside of the tube. 



1. H YDUOPH YLLUiM. Calyx .5-parted, sometimes with small appendages at the sinuses, 



not enlarjfed in fruit. Corolla bell-shaped. Style and mostly hairy filaments pro- 

 ti-uded ; anthers linear. Pod small, globose, ripening 1-4 spherical seeds. Flowers 

 in crowded cymes or clusters. Leaves alternate, slender-petioled. 



2. NEMOPIIILA. C'aly.x 5-parted, and with a reflexed appendage in each sinus, somewhat 



enlarging in fruit. Corolla open bell-shaped or wheel-shaped, longer than the stamens. 

 Flowers solitaiy and long-iiediineled. Leavt^ mostly opposite, at least the lower 

 ones. 



3. ELLISIA. Calyx 5-partcd, with no appendages. Corolla cylindrical or bell-shaped, not 



exceeding the calyx, the tube with 5 minute appendages within. Stamens included. 

 Lower leaves opposite. 

 ^- ^- Placentce narrow, adherent directly to the walls, or else home on an incomplete 

 partition and projecting into the cell, tvhere they sometimes meet ; lobes of the 

 corolla imbricated in the bud. 



4. PHACELL\. Calyx 5-parted, the divisions narrow; no apj)endages at the sinuses. 



Corolla open bell-shaped, approaching wheel-shaped, or in Whitlavia tubular-bell- 

 shaped or slightly contracted at the throat, and the 5 short and broad lobes abruptly 

 and widely spreading. Stamens and style often protruded. Pod 4-many-seeded. 

 Leaves alternate. Flowers in one-sided rnceme-like clusters or spikes. 

 » » Styles 2 (rarely 8), separate quite to the base ; ovary and pod 2-celled ; seeds minute 

 and very numerous. 



5. IIYDROLEA. Ciil.vx 5-partcd. Corolla open-bell-shaped or approaching wheel-shaped, 



rather shorter than the stamens ; filaments enlarged at base. Capsule bursting irreg- 

 ularly, or 2-4-v8lved. Herbs, or somewhat shrubby, with entire leaves and often 

 spines in their axils. Flowers in loose axillary clusters. 



