258 WATERLEAF FAMILY. 



• « Spikes collected in terminal and several times forked cymes : woody-stemmed 



or shrvhby house and bedding plants from Peru and Chili. % 

 H. !PeruviS,nuin, Sweet Heliotrope. Pubescent, with oyate-oblong 



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



flowers. 

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



deeper-blue flowers of much less fragrance. 



13. HELI6PHYTUM. (Name of the Greek words for sun and plantf 



indicating the resemblance to Heliotrope.) 



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

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

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

 2-lobed fruit. ® 



81. HYDB,OPHYLLACE.ffiJ, 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 -celled ovary and pod with 

 2 parietal placentae. 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, uiith tivo parietal placentie, 



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



a/nd seeds: coroUa usually convolute in ike Imd^ commonly wiA 5 or 10 folds^ 

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



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



sinuses, not enlarged in fruit. Corolla bell-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, 

 slender-petioled. 



2. NEMOPHILA. Calyx 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 solitary and long-pedunoled. Leavei 



mostly opposite, at least the lower ones. 



« * Placenta narrow, adherent Erectly to the walls, or else borne on a/n incomplete 



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



corolla imbricated in ike bud. 



■ 8. PHACELIA. Calyx 5-parted, the divisions narrow ; no appendages at th« 

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

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

 one-sided raceme-like clusters or spikes. 

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

 the B 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. HYDROLEA. Calyx 5-parted. Corolla open-beU-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 loose axiUary clusters. 

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

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

 as yet uncommon. 



