258 WATERLEAP FAMILY. 



* * Spikes collected in terminal and several times forked cyrnes: woody-stemmed 



or shrubby house and bedding plants from Peru and Chili, y. 



H. Peruvidinum, Sweet Heliotrope. Pubescent, with ovate-oblong 

 or lance-ovate very veiny rugose leaves, and vanilla-scented pale blue-purple 

 flowers. . , . t 1 A 



H. eorymbbsum. Cult, with the other, differs mainly in the larger ana 

 deeper-blue flowers of much less fragrance. 



13. HSLIOPHYTTJM. (Name of the Greek words for sun and plant, 



indicating the resemblance to Helioti-ope.) 



H. Indicum, Indian Heliotrope : hairy low plant, nat. from India as a 

 weed in waste sjround S. ; with ovate heart-shaped leaves, and solitary spikes of 

 small purpUsh flowers, in summer ; a cavity before each seed-bearing cell of the 

 2-lobed fruit. ® 



81. HYDROPHYLLACEiE, WATERLEAF FAMILY. 



Plants in some sort resembling both the foregoing and the following 

 families, in the arrangement of the flowers more commonly imitating 

 the former; differing from both in the 1-celIed ovary and pod with 

 2 parietal placentse. In some the placentae unite in the axis, making 

 a two-celled ovary. Style 2-cleft or else 2 separate styles. Ovules 

 at least 2 to each placenta. Seeds with a small embryo in hard 

 albumen. Juice inert and watery. Leaves mostly alternate, simple 

 or compound. The following are all N. American plants, some 

 wild, the others cult, for ornament from the West. 



§ 1. Style 2-cleft: ovary and pod 1-celled, with two parietal placentce, 



• These fleshy and so broad that they line the ovary, and enclose the (mostly 4) ovules 



and seeds : corolla usually convolute in the bud, commonly ynth 5 or \0 folds, 

 scales, or other appendages doicn the inside of the tube. 



1. HYDEOPHYLLUM. Calyx 5-parted, sometimes with small appendages at the 



sinuses, not enlarged in fruit. Covolla beU-shaped. Style and mostly hairy 

 •filaments protruded : anthers linear. Pod small, globose, ripening 1-4 

 spherical seeds. Flowers in crowded cymes or clusters. Leaves alternate, 

 stender-petioled. 



2. NEMOPHILA. Calyx 5-parted, and with a reflexed appendage in each sinus, 



somewhat enlarg'ing in fruit. Corolla open bell-shaped or wheel-shaped, 



longer than the stamens. Flowers solitary and long-peduncled. Leaves 



mostly opposite, at least the lower ones. 



» * Placentce narrow, adherent directly to the walls, or else borne nn an incomplete 



partition and projecting into the cell, where they sometimes meet : lobes of the 



corolla imbncated in the bud. 



3. PHACELIA. Calyx 5-parted, the divisions narrow ; no appendages at the 



sinuses. CoroUa open bell-shaped, approaching wheel-shaped. Stamens and 

 style often protnided. Pod 4 - many-seeded. Leaves alternate. Flowers in 

 one-sided raceme-like clusters or spikes. 



4. WHITLAVIA. Corolla tubular-beU-shaped or slightly contracted at the throat, 



the 5 short and broad lobes abruptly and widely spreading. (Pod many- 

 seeded.) Otherwise as the last section of Phacelia. 



§ 2. Styles 2 {rarely 3), separate quite to the base: ovary and pod 2-celled; seeds 



minute and very numerous. 

 6. HYDROLE A. Calyx 5-parted. Corolla open-bell-shaped or approaching wheel- 

 shaped, rather shorter than the stamens : filaments enlarged at base. Herbs, 

 or somewhat shrubby, with entire leaves and often spines in their axils. 

 Flowers in loos^ axillary clusters. 

 WIGANDIA, from South America, with very large rounded leaves and sharp 

 or stinging bristles, is of late planted out as an ornamental leaf-plant, but is 

 as yet uncommon. 



