208 American Midland Naturalist Monograph No. 7 



1. Pedicels erect or ascending in fruit; spur evident. 

 3. Stems slender, elongated, creeping in shallow water. 



4. Leaf-segments capillary; upper lip of the corolla equalling 

 the lower; lake shores or shallow water, local. Aug. -Oct. 



U. gibba L. 



4. Leaf-segments linear, flat, often minutely serrulate; upper 

 lip of the corolla about half the length of the lower; 

 shallow water; Lake, Ogle, and Tazewell counties. July- 



Aug U. intermedia Hayne 



3. Stems short, submerged in the mud; leaves rarely seen; corolla 

 1.5-2 cm broad, the subulate spur 7-12 mm long, pointing 

 downward; lake shores and peat bogs, rare; Lake Co., Hill; 

 Cook Co., Pearsall in 1943. July-Aug. Horned Bladdei-wort 

 [Stomoisia cornuta (Michx.) Raf.] U. cornuta Michx. 



113. Orobanchaceae Lindl. — Broomrape Family 



1. Flowers of 2 kinds, the lower cleistogamous and fertile, the upper complete 

 but usually sterile; stamens included; branches slender, ascending, simple 



1. Epifagus 



1. Flowers all perfect and complete. 



2. Flowers in a thick scaly spike; stamens exserted; plants glabrous 



2. Conopholis 



2. Flowers solitary or racemose; stamens included; plants glandular- 

 puberulent 3. Orobanche 



1. Epifagus Nutt. — Beech-drops 

 E. virginiana (L.) Bart. Under beech trees, parasitic; locally in 

 the s. half of 111., extending northw. in the valley of the Wabash R. 

 to Clark Co. Sept.-Oct. 



2. Conopholis Wallr. — Squaw-root 

 C. americana (L.f.) Wallr. In wooded ravines, parasitic on roots 

 of oak trees; locally in the n. half of 111., as far s. as Clark Co. 

 May-July. 



3. Orobanche L. — Broomrape 



1. Flowers numerous, sessile or short-stalked, spicate or racemose. 

 2. Calyx 4-lobed, the lobes triangular-ovate, about as long as 

 the tube; flowers subtended by 1 large and 2 small bracts; 

 raceme loosely flowered ; stem branched ; parasitic on roots 

 of herbaceous plants, rare; adv. from Ein\ ; Rantoul, Cham- 

 paign Co., Aug. 28, 1895, G. P. Clinton O. ramosa L. 



2. Calyx 5-cleft, the lobes linear-lanceolate, 7-8 mm long, longer 

 than the tube; flowers subtended by 1 or 2 bracts; spikes 

 terminal, dense; stem simple; parasitic on various plants, 

 particularly Ambrosia, Artemisia, and other Compositae in 

 sandy soil, not common; known from Lee, Menard, Wabash, 

 and White counties. Aug.-Sept. [Myzorrhiza ludoviciana 

 (Nutt.) Rydb.] O. ludoviciana Nutt. 



