In deep or shallow quiet water, rare in s.e. Okla. (McCurtain Co.) and s.e. 

 Tex. (also reported from the Panhandle), westw. through N.M. (Catron, San Juan 

 and Sandoval cos.) to Ariz. (Apache and Coconino cos.), Apr .-Aug.; from s. 

 Lab. to Alas., s. to Va., O., Ind., Mo., Tex. and Mex. 



8. Utricularia gibba L. Cone-spur bladderwort. Fig. 714. 



Plant with delicate filiform creeping or floating stems and branches, the 

 sparsely leafy often intricately entangled plumes of foliage to 2 cm. in diameter 

 and 3 dm. long: leaves usually with 2 filiform segments and with few scattered 

 bladders; scapes to 1 dm. high, 1- to 3-flowered; larger sepal suborbicular, 2-3 

 mm. long; corolla yellow, 6-12 mm. high, 6-8 mm. broad, the nearly equal lips 

 projecting forward, the oblong-conic obtuse spur much shorter than the lower lip; 

 fruiting pedicels ascending, to 1 cm. long; capsule 2-3 mm. thick, about as long 

 as the sepals; seeds broadly winged, the body smooth. 



In mud of marshes, bogs and seepage areas and forming mats and on floating 

 debris in shallow water in e. half of Okla. and mostly in the e. half of Tex., 

 s. to Cameron Co. and w. to Val Verde Co., June-Oct.; from Fla. to Tex. and 

 Mex., n. to e. Can., Mich., Wise, Minn, and Okla., w. to Calif. 



9. Utricularia fibrosa Walt. Fig. 715. 



Plant closely resembling U. gihba\ stems creeping on the bottom in shallow 

 water, radiating from the base of the scape, dimorphic, some without bladders 

 that have rather crowded thrice-forked leaves to about 15 mm. long, the other 

 with smaller twice-forked leaves bearing numerous bladders; peduncles to about 

 15 cm. high, with 2 to 6 long-pediceled flowers; corolla yellow, the lower lip 

 8-10 mm. long and with a prominent palate; spur equaling or slightly exceeding 

 the lower lip; capsule globose; seeds broadly winged, the body rough-tuberculate. 



Floating on mats of debris and rooted in shallow water of slow streams, ponds 

 and lakes in e. Okla. (Waterfall) and e. Tex., June-July; from Mass. to Fla., w. 

 to Tex., Ark. and Okla. 



This is our only Utricularia with dimorphic stems and leaves. The bladders 

 are borne mostly on stems and only occasionally on the leaves. 



10. Utricularia biflora Lam. Fig. 716. 



Plant closely resembling both U. gibba and U. fibrosa; stems all alike, with 

 bladders throughout, floating on mats of debris or creeping on the bottom in 

 shallow water; leaves very delicate, rarely more than 5 mm. long, usually with 

 3 or more segments; scapes erect, to about 15 cm. long, usually much shorter, 

 with 1 to 4 flowers; pedicels filiform, about 15 mm. long; sepals 2.5-4 mm. long; 

 corolla yellow, very similar to those of U. fibrosa, to 17 mm. high; lower lip 8-10 

 mm. long, with a prominent palate; spur about as long as or much shorter than 

 the lower lip; fruiting pedicels to 25 mm. long; capsule 3.5-4 mm. thick, slightly 

 exserted. U. pumila Walt. 



In shallow water e. Okla. {Waterfall) and s.e. Tex., June-July; from e. Mass. 

 to Fla., Tex. and Okla. 



2. Pinguicula L. 



About 35 species, widely distributed. 

 1. Pinguicula pumila Michx. Small butterwort. Fig. 717. 



Perennial terrestrial scapose herb with fibrous roots; leaves in a basal rosette, 

 soft-fleshy, greasy to the touch, elliptic to elliptic-obovate, obtuse to rounded at 

 apex, narrowed at base, 1-3 cm. long; scapes one or usually several, 1 -flowered, 

 naked, very slender, erect, glandular-puberulent, to 2 dm. tall, usually much 

 smaller; calyx 5-lobed, more or less united and bilabiate; calyx lobes oblong, 



1522 



