360 HYDKOPHYLLACE^.. (WATERLEAF FAMILY.) 



wliite (4-6" broad) ; filaments hairy; capsule globular, 6- 12-seeded, a half 

 shorter than the calyx. — Shaded banks, Peun. and Ohio to Mo., south to 

 S C. and Tex. April -June. 



Var. hirsuta, Gray. More hirsute and the stems less slender, apparently 

 growing in more open dry soil ; corolla larger, 5 - 7" in diameter ; seeds 4-8. 

 — Prairies and barrens, S. W. Mo. to E. Tex. ; also Va. and Ga. 



5. P. Covillei, Watson. Like the last; racemes 2-5-flowered; calyx- 

 lobes linear, in fruit 3" long or more ; corolla tubular-campanulate with erect 

 limb ; filaments glabrous ; capsule depressed-globose ; seeds 4, large. — Lark- 

 spur Island in the Potomac, five miles above Washington. {F. \\ Coville.) 



§ 4- EtlTOCA. Ovules and seeds numerous on each placenta ; corolla rotate- 

 campanulate, with 10 vertical lamellce within. 



6. P. Franklinii, Gray. Soft-hairy; stem erect (6-15' high), rather 

 stout ; leaves pinnately parted into many lanceolate or oblong-linear lobes, 

 which are crowded and often cut-toothed or pinnatifid ; racemes short, dense, 

 crowded mto an oblong spike; calyx-lobes linear; corolla blue. — Shores of 

 li Superior, thence north and westward. 



5. HYDROLEA, L. 



Calyx 5-parted. Corolla short-campanulate or almost wheel-shaped, 5-cleft. 

 Filaments dilated at base. Styles 2, distinct. Capsule globular, 2-celled, with 

 very large and fleshy many-seeded placentae, thin-walled, 2-4-valved or burst- 

 ing irregularly. Seeds minute, striate-ribbed. — Herbs or scarcely shrubby, 

 growing in water or wet places (whence the name, from vdup, water), with 

 entire leaves, often having spines in their axils, and clustered blue flowers. 



1. H. afifinis, Gray. Glabrous throughout ; stem ascending from a creep- 

 ing base, armed with small axillary spines ; leaves lanceolate, tapering to a 

 very short petiole ; flowers in small axillary leafy-bracted clusters ; divisions 

 of the calyx lance-ovate, equalling the corolla and the irregularly-bursting 

 globose capsule. — Banks of streams, S. 111. to Tex. 



Order 72. BOKRAGINACE^. (Borage Family.) 



Chiefly rough-hairij herbs, icith alternate entire leaves, and symmetrical 

 Jiowers with a b-parted calyx, a regular b-lohed corolla (except in Echium), 

 5 stamens inserted on its tube, a single style and a usually deeply 4:-lobed 

 ovary {as in Labiatfe), forming in fruit 4 seed-like 1-seeded nutlets, or 

 separating into tico 2-seeded or four l-seeded nutlets. — Albumen none. 

 Cotyledons plano-convex ; radicle pointing to the apex of the fruit. 

 Stigmas 1 or 2. Calyx valvate, the corolla imbricated (in Myosotis 

 convolute) in the bud. Flowers mostly on one side of the branches of 

 a reduced cyme, imitating a spike or raceme, which is rolled up from ihe 

 end, and straightens as the blossoms expand (circinate or scorpioid), 

 often bractless. (A rather large family of innocent, mucilaginous, and 

 slightly bitter plants ; the roots of some species yielding a red dye.) 



Tribe T. HEL,IOTROPIE^. Ovary not lobed ; fruit separating into 2 - 4 nutlets. 

 1 Heliotropium. Corolla salver-form. Stamens included. Nutlets 1 - 2-celled. 



