210. FOUNDATIONS OF 1J(JTANY 



4. U. vulgaris, L. Greater Bladdeuwoijt. Steins submerged, 

 leafy, 1-3 ft. long. Leaves spreading, pinnatcly cut into very many 

 thread-like segments \vliich bear many bladders. Scapes 6-12 in. 

 long, 5-12-flowered, pedicels bent down after flowering. Corolla ^-| 

 in. long, yellow, upper lip broad and short, palate prominent; spur 

 conical, pressed close to the under lip. Ponds and slowly flowing 

 streams. 



93. ACANTHACE^. Acanthus Family. 



Herbs or shrubs. Leaves opposite or w^horled, without 

 stipules. Flowers irregular, usually with large bracts. Calyx 

 of 4 or 5 unequal segments which considerably overlap each 

 other. Corolla 4-5-parted and usually more or less 2-lipped. 

 Stamens usually 2 long and 2 short, sometimes only 2. Ovary 

 free from the calyx. Fruit usually a capsule. Seeds not 

 winged. A large family, mostly tropical, with only a few 

 insignificant wild species in the northern United States. 



I, RUELLIA, Plumier. 



Perennial herbs ; stems swollen at the joints and often 

 between them, somewhat 4-angled. Leaves sessile or short- 

 petioled, mostly entire. Flowers axillary, solitary or clustered, 

 showy, white, blue, or purple. Calyx 2-bracted, 5-parted, the 

 divisions linear and awl-shaped. Corolla-tube slender, often 

 much elongated, the limb spreading, nearly equally 5-lobed. 

 Stamens 4, 2 long and 2 short, included or slightly projecting. 

 St}'le slender. Capsule slender, narrowed below, 4-12-seeded.* 



1. R. strepens, L. Smooth Ruellia. Stem erect, slender, 

 usually simple, smooth or hairy, 1-3 ft. high. Leaves ovate to 

 oblong, .acute at the apex, narrowed below into a short petiole. 

 Flowers solitary or in small clusters, sessile or short-peduncle d. 

 Calyx-lobes shorter than the tube of the corolla, downy or fringed. 

 Corolla blue, the tube 1^-2 in. long, the limb 1-1 j in. wide. Cap- 

 sule usually longer than the calyx, smooth, 8-12-seeded. The later 

 flowers often without a corolla. On rich, dry soil.* 



2. R. ciliosa, Pursh. Hairy Ruellia. Stem erect, rather stout, 

 often few-branched above, covered with white hairs, 4-30 in. high. 

 Leaves oblong to ovate, acute or obtuse at the apex, narrowed and 



