334 GESNERIA FAMILY. 



and with short slender branches at its base, and blunt conical spur shorter 

 than lower lip. Shallow water, Mass., W. and S. 



U. bifl6ra, Lam. Stems 4'-6' long, bearing rootlet-like leaves and 

 many bladders, 1-3-flowered peduncles 2'-4' high, and awl-shaped spur 

 as long as lower lip. 111., W.; also near Cape Cod. 



U. intermedia, Hayne. In shallow water, with stems 3'-6' long, bear- 

 ing rather rigid leaves with linear-awl-shaped divisions, and no bladders, 

 these being on separate leafless branches, the slender raceme few-flow- 

 ered ; spur nearly equaling the very broad lower lip. Pools, N. Eng., W. 



*- - Flowers violet-purple. 



U. purpurea, Walt. Flowers Z-4 on the peduncle, and a rather short 

 spur appressed to the 3-lobed lower lip of corolla. Me., W. and S. 



* * * Simple and erect naked scape-like stem rooting in wet soil, with 

 minute and fugacious grass-like leaves seldom seen; commonly no blad- 

 ders ; flowers yellow. 



U. subulata, Linn. Mass., S. in wet sand ; very slender, 3'-5' high, 

 with several very small slender-pediceled flowers. 



U. corniita, Michx. 6'-15' high, bearing 2-4 large flowers crowded 

 together on short pedicels, or S. with 4-12 more scattered and smaller 

 flowers. Peat bogs and dryish lake borders throughout. 



2. PINGUICULA, BUTTEEWORT. (Name from Latin: pinguis, 

 fat. Both names from the fatty or greasy-looking leaves, which in 

 ours are more or less clammy pubescent.) 



* Corolla violet-purple, distinctly 2-lipped. 



P. vulgaris, Linn. Scarce on wet rocks along our northern borders ; 

 scape 2' high ; upper lip of corolla short ; spur straightish and slender ; 

 flowers summer. 



* * Corolla light violet (rarely white"), rather obscurely 2-lipped. 



P. pumila, Michx. In moist sand from Car., S. and W., has rather 

 large flower on scape 2'-6' high, with blunt sac-like spur ; flowers spring. 



P. elatior, Michx. Borders of ponds from N. Car., S., has scapes near 

 1 high, and large corolla (!' wide) with blunt spur; flowers summer. 



* * * Corolla yellow, more bell-shaped, less distinctly 2-lipped, the 5 lobes 



often cleft. 



P. lutea, Walt. Wet pine barrens, N. Car., S. ; whole plant yellow- 

 ish, with nodding flower (!' or more wide) on scape 6'-12' high, in spring. 



ixxxiv. GESNERACEJ:, GESKERIA FAMILY. 



Tropical plants, with 2-lipped or somewhat irregular corol- 

 las, didynamous stamens, a 1-celled ovary with two parietal 

 many-seeded placentae, therefore botanically like the Broom 

 Rape Family ; but with green herbage, and not parasitic, and the 

 common cultivated species have the tube of the calyx coherent 

 at least with the base of the ovary. Many, and some very 

 showy, plants of this order are in choice conservatories ; the 

 commonest are the following. 



