HYDROPIIYLLACE^. (WATERLEAF FAMILY.) 3G7 



Order 73. HYDROPIIYLLACE^. (Waterleaf Family.) 



Herbs, commonhj hairy, wi:h moslli/ alternate leaves, ref/ular 5-merous and 

 b-androus flowers, in aspect between the foregoing and the next order; but 

 the ovari/ entire and l-celled with 2 parietal 4 - many-ovuled placenta, or 

 rarely 2-celled by the union of the i^lacenloi in the axis; style 2-clefi or 2 

 separate styles ; fruit a 2-valved 4 - many-seeded pod. — Seeds mostly retic- 

 ulated or pitted. Embryo small in copious albumen. — Flowers cliieHy blue 

 or white, in one-sided cymes or ra'.'emes, which are mostly bractless and 

 coiled fi'om the apex when young, as in the Borage Family. (A small order 

 of plants of no marked properties, some cultivated for ornament.) 



Tribe I. H YDROPH VL.l,E.E. Ovary and pod 1-celleiI. Seeds amphitropous, pitted 



or reticulated, and with cartilayiuous albumen. Leaves usually cut-toothed, lobed or pinnate. 

 Style 2-cleft. 

 « Ovary lined with the dilated and fleshy placenta, which enclose the ovules and seeds (in our 

 plants these are only 4 in numl)er) like an inner pericarp. 



1. Hydropliy Hum. Stamens exserted : anthers linear. Calyx unchanged in fruit. 



2. Neiiiopltila. Stamens included -. anthers shoi't. Calyx with ap])endagcs at the sinuses. 



3. Ellisiu. Stamens included. Calyx destitute of appL'ndages, enlarfred in fruit. 



# * Ovary with narrow pwietal placentEe, in fruit projecting inwards more or less. 



4. Pliai'elia. Coralla-lobes imbricated in the bud. Calyx destitute of appendages. 



Tribe II. HYDROLE.E. Ovary and pod 2-celled, the placentas often projecting from 

 the axis far into the cells. Seeds anatropous : albumen fleshy. Leaves undivided. 



5. Uydrolea. Corolla between wheel-shaped and bell-shaped. Styles 2 Leaves entire. 



1. HYDROPHYLLTJM, L. Waterleaf. 



Calyx 5-partctl, sometimes with a small appendage in each sinus, early open 

 in the bud. Corolla bell-shaped, 5-clcft; the lobes convolute in the bud; the 

 tube furnished with 5 longitudinal linear appendages opposite the lobes, which 

 cohere by their middle, while their edges are folded inwards, forming a necta- 

 riferous groove. Stamens and style mostly exserted : filaments more or less 

 bearded : anthers linear. Ovary bristly-hairy (as is usual in the famil}-) ; the 2 

 fleshy placentae expanded so as to line the cell and nearly fill the cavity, soon 

 free from the walls except at the top and bottom, each bearing a pair of ovules 

 on the inner face. Pod rii)ening 1-4 seeds, spherical. — Perennials, with petiolcd 

 ample leaves, and white or pale blue cymose-clustered flowers. (--Naftie formed 

 of i^^otfp, water, and (f)v\Xov, leaf; of no obvious application to these plants.) 



* Calyx toifk minute if any appendages: rootstocks creeping, sca/y-toot/ied. 



1. H. macroph^llum, Nutt. Rough-hain/ ; Imces oblong, pinnate and 

 pinnatifd; the dirisions 9-13, ovate, obtuse, coarsely cut-toothed; peduncle very 

 long; calyx-lohcs lanccolatc-pointcd from a broad base, very hairy. — Kocky, 

 shaded l)anks, Ohio, Indiana, Kentucky, and southward. July. — Pioot-lcavcs 

 1° long ; flowers crowded in a globular cluster. 



2. H. Virginieum, L. 5(/wv/f/.s/i (1°- 2°high); leaves pinnntelydlrldcd; 

 the divisions 5-7, ovate-Uinoolate or oblong, pointed, sharjdy cut-toothed, the lowest 

 mostly 2-parted, the uppermost confluent ; peduncles longer 'han the petioles of the 

 ujiper leaves, forked ; calyx-lobas narrowly linear, bristly-ciliatc — Damp woods. 

 June - Aug. 



