2J8 WATERLEAF FAJIILT. 



* * Spikes collected in terminal and several times forked cymes : vioody-stemmid 



or shrubhi/ house and beddim; plants from Peru and Chili, y, 

 H. Peruvi&num, Sweet Heliotrope. Pubescent, with ovate-oblong 



or lance-ovate very veiny rngose leaves, and vanUla-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. HELIOPHYTTJM. (Name of. the Greek words for sun and plant, 



indicating the resemblance to Heliotrope.) 



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

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

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

 2-lobed fruit. ® 



81. HYDROPHYLLACE^, WATERLEAF FAMILY. 



Pliints 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 I-celled ovary and pod with 

 2 parietal placentas. 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-cle/t: ovary and pod 1-celled, with two parietal placetiicB, 



* These fleshy and so broad that they line the ovary, and enclose the (mostly i) omdet 



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

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



1. HYDROl^HYLLUM. Calyx 5-partod, 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, 

 Rlender-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-peduncled. Leaves 

 mostly opposite, at least the lower ones. 



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



pxrtition and projecting into the cell, where they sometimes meet: kibes of the 

 corolla imbricated in the bad. 



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



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

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

 one-sided raceme-like clusters or spikes. 



4. WHITLA VIA. Corolla tubular-bell-shaped or slisrhtly conti-aoted at the throat, 



the 6 short and broad lobes abruptly and widelv'spreadrng. (Pod many- 

 seeded.) Otlierwise as the last section of Phacelia. 



§ 2. Styles 2 (rarely 8), separate quite to the base: ovary and pod 2-celkd: seeds 

 minute and very numerous. 



5. HYDROLEA. Calyx 5-parted. Corolla open-bo!l-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, 

 (lowers in loose axillary clusters. 

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

 or stingmg bristles, is of late planted out as an ornamental leaf-plaut, but is 

 as yet uncommon. 



