Vou III.] 



BL ADD KR WORT FAMILY. 



189 



the lobes equal or nearly so. Corolla 2-lipped, the upper lip usually erect and entire, the 

 lower larger, 3-lobed, spurred at the base and with a promiuent palate, commonly bearded 

 in the throat. Capsule many-seeded. [Latin, utriculus, a bag, or little bladder.] 



About 150 species, of wide geographic distribution. Besides the following, 3 others occur in 

 the southern United States. 



;:- Scapes rooting in the mud; leaves entire; bladders usually few or none. 



Scapes stout, strict, 1-10-flowered; flowers yellow, 4" -10" broad. 



Flowers 8"-io" broad; spur 6" long. 



Flowers 4"-5" broad; spur 3" long. 

 Scape filiform, 2-bracted above; flower solitary, purple. 

 Scape filiform, the raceme zig-zag; flowers 1-10, yellow. 

 Scape filiform; flowers minute, cleistogamous. 



1. U. cornuta. 



2. U. juncea. 



3. U. resupinata. 



4. U. subulata. 



5. U. cleistogama. 



Jf -X- Branches and finely divided leaves floating, or creeping on the mud, bladder-bearing. 

 t Scape bearing a whorl of leaves with inflated petioles. 6. U. inflala. 



f t Scape leafless, or with a few minute scales. 



Leaves verticillate; corolla purple. 



Leaves crowded, 2-3 pinnately divided; corolla yellow, large. 



Leaves scattered, dichotomously divided. 



Cleistogamous flowers among the leaves. 

 No cleistogamous flowers. 



Bladders mainly or entirely on leafless branches. 

 Leaf-segments linear, flat. 

 Leaf-segments capillary. 

 Bladders among the leaves. 



Flowers 2-8; spur usually reduced to a short protuberance. 

 Flowers 1-2; spur shorter than the lower lip, conic, gibbous. 

 Flowers 1-3; spur oblong, as long as the lower lip. 



7. U. purpurea. 



8. U. vulgaris. 



9. U. clandeslina. 



10. U. intermedia. 



11. U. fibrosa. 



12. U. minor. 



13. U. gibba. 



14. U. biflora. 



i. Utricularia cornuta Michx. Horned 

 Bladderwort. (Fig. 3342.) 



Utricularia cornuta Michx. Fl. Bor. Am. 1: 12. 1803. 



Scape stout, strict, 3 / -i4 / high, with or without a 

 few scattered scales, rooting in the mud. Stems and 

 branches root-like, sometimes with a few entire leaves 

 and few bladders, or several; flowers 1-6, yellow, fra- 

 grant; pedicels i // -2 // long; corolla 8 // -io // broad when 

 expanded; lower lip large, somewhat galeate, the sides 

 strongly reflexed, with a prominent palate which pro- 

 jects inwardly and is pubescent at the throat; upper 

 lip smaller, obovate; spur ]/ z f long, acute, curved; 

 seeds black, rugosely pitted. 



On borders of ponds, or in bogs, Newfoundland to On- 

 tario and Minnesota, south to Florida and Texas. June- 

 Aug. 



2. Utricularia juncea Vahl. Rush Bladder- 

 wort. (Fig. 3343-) 



Utricularia juncea Vahl, Enum. 1: 202. 1805. 



Scape rather stout, strict, 6 / -i6 / high, rooting in the mud, 

 bearing few or several minute scales. Leaves not seen; 

 flowers 3-10, bright yellow; pedicels i // long, or less; cor- 

 olla 4 // -5 // broad when expanded, the lower lip obovate, 

 pointed, mainly composed of the palate, the upper little 

 smaller, obovate, emarginate; spur linear-subulate, 

 slightly curved, or straight, about 3" long. 



In bogs, southeastern Virginia to Florida and Texas, mostly 

 near the coast. Also in the West Indies and South America. 

 July-Aug. 



