258 WATERLEAF FAMILY. 



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



or sJirubly house and bedding plants from Peru and Chill. 11 

 "FT. Peruvian urn, SWEET HELIOTROPE. Pubescent, with ovate-oblong 



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



flowers. 



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



deeper-blue flowers of much less fragrance. 



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



indicating the resemblance to Heliotrope.) 



EC. Indicum, INDIAN HELIOTROPE : hairy low plant, nat. from India as a 

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

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

 2-lobed fruit. 



81. HYDROPHYLLACE^E, WATERLEAF FAMILY. 



Plants in some sort resembling both the foregoing and the following 

 families, in tbe arrangement of the flowers more commonly imitating 

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

 2 parietal placenta?. 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 l-celled, with two parietal 2>lacentce, 



* These fleshy and so bi'ortd that they line (he ovary, and enclose the (mostly 4) ovules 



and seeds: corolla usually convolute in the bud, commonly with 5 or 10 folds, 

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



1. HYDROPHYLLUM. 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. NEMO PHIL A. 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-peduncled. Leaves 

 mostly opposite, at least the lower ones. 



* * Placentae narrow, adherent directly to the walls, or else borne on an incomplete 



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

 corolla imbricated in the bud. 



3. PHACELIA. 



sinuses. 



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 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. HYDROLEA. 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 loose axillary clusters. 



WIGANDIA, trom 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. 



L Calyx 5-parted, the divisions narrow ; no appendages at the 

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



