IlVDKOl'UVLLACK.*:. ( WATKKLKA K FAMILY.) o>) i 



2. P. caeruleum, L. (Ja((»I5's Lai.i.kh.) SUmu omt (1-3° high); 

 leallets 9-21, linear-lanceohvtc, ohlung- or ovatc-laiiccuhitc, mosLly crowded; 

 Howers uumerous, iu a tliyrsus or contracted panicle ; lobes of the calyx l(Jiip;or 

 tlian tlie tube ; stamens and sti/le moxi/ij exscrted beyond the brif^ht blue corolla, 

 which is nearly 1' broad; capsule several-seeded. — Rare in our ranc;e, occur- 

 ring iu SAvani]is and on mountains iu N. II., N. Y., N.J., and Md., l)ut conunon 

 iu the western mountains and far northward. 



Ordi-u 71. HYDKOPHYLLACEyE. (Watkrli: af Family.) 



Herbs, commonly hairi/, ic'itli mosthj alternate leaves, regular b-merous and 

 b-androus /lowers, in aspect heticeen the fore f/oing and the next order; but 

 the ovary entire and l-celled with 2 parietal 4 - many-ovuled placentce, or 

 rarely 2-celled by the union of the placentce in ifie axis ; style 2-cleft, or 2 

 separate styles ; fruit a 2-valred A -many-seeded capsule. — Seeds mostly 

 reticulated or pitted. Kinbryo small in copious albumen. — Flowers 

 chieny blue or white, in one-sided cymes or false racemes, which are 

 mostly bractless and coiled from the apex when young, as in the Borage 

 Family. A small order of })lants of no marked properties ; some culti- 

 vated for ornament. 



Tribe I. HYDKOPHYLLE^. Ovary and capsule l-colled. Seeds pitted or retiou- 



lated ; albumen cartilaginous. Leaves cut-tootlied, lobed or pinnate. Style 2-cleft. 



* Ovary lined with the dilated and fleshy placentai, which enclose the ovules and seeds (in 



our plants only 4) like an inner pericarp. 



L Hydrophyllum. Stamens exserted; anthers linear. Calyx unchanged in fruit. 



2. Neniophila. Stamens included ; anthers short. Calyx with appendages at the sinuses. 



8. Ellisia. Stamens intduded. Calyx destitute of appendages, enlarged in fruit. 



* * Ovary with narrow parietal placentse, in fruit projecting inward more or less. 



4. Pliacelia. Corolla-lobes imbricated in the bud. Calyx destitute of appendages. 

 Tribe II. HYDROL.E.<E. Ovary and capsule 2-celled, the placentae often projecting 



from the axis far into the cells. Albumen fleshy. Lea\'es entire. Styles 2. 



5. H>tlrolea. Corolla between wheel-shaped and bell shaped. 



1. HYDROPHYLLUM, Tourn. Waterleaf. 



Calyx 5-parted, sometiuics with a small ajipeudage iu each sinus, early open 

 iu the bud. Corolla bell-sha])od, o-cleft ; the lobes convolute in the bud ; the 

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

 cohere by their middle, while their edges are folded inward, 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 family) ; i\\^ 

 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, eacii bearing a pair of ovules 

 on the inner face. Ca])sule ripening 1-4 seeds, spherical. — Perennials, with 

 petioled ample leaves, and white or pale blue cymose-clustered flowers. (Name 

 formed of uSwp, irater, and <pv\\ov, leaf; of no obvious application.) 



* Calyx with minute if any appendages ; rootstocks creeping, scaly-toothed. 



1- H. macroph^llum, Nutt. Bough-hairy; leaves oblong, pinnate and 

 pinnotijid ; tite divisions 9 - 13, or<7/<', o/)/H,«{e, coarsely cut-toothed ; root-leaves 



