232 American Midland Naturalist Monograph No. 2 



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

 lake shores or shallow water, n.e. III.; also in St. Clair and Jackson 

 counties. 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. July-Aug. 



Peoria, Brendel; Waukegan, Hill U. intermedia Hayne 



3. Stems short, submerged in the mud; leaves rarely seen; corolla L5-2 cm. 

 broad, the subulate spur 7-12 mm. long, pointing downward; lake 

 shores and peat bogs, rare. Lake Co., Hill; Cook Co., Pear sail in 1943. 

 July-Aug. [Stomoisia cornuta (Michx.) Raf.} Horned Bladderwort 

 U . cornuta Michx. 



139. Orobanchaceae Lindl. — Broomrape Family 



I. Flowers of 2 kinds, the lower cleislogamous 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. 



(Eptphegus Spreng. ; Lepiamniitm Raf.) 

 E. virginiana (L.) Bart. Beech-drops. Parasitic on the roots of beech trees. 

 Sept.-Oct. 



2. Conopholis Wallr. — Squaw-root 



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

 trees, not common. Cook Co., Hill; Vermilion Co., G. N. Jones 13346. 



3. Orobanche L. — Broomrape 

 (Thalesia Raf.; Aphyllon Gray) 

 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 flow- 

 ered; stem branched; parasitic on roots of herbaceous plants; adv. or 

 nat. from Eur 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, including Ambrosia, Artemisia, and 

 other Compositae in sandy soil, not common. Aug. -Sept. [Myzorrkiza 



ludoviciana (Nutt.) Rydb.} O. ludoviciana Nutt. 



1. Flowers few or solitary on bractless scapes; calyx 5-cIeft. 



3. Flowers 3-15; calyx-lobes triangular-lanceolate, shorter than the tube; para- 



sitic on Artemisia and other Compositae in sandy soil, local. Savanna, 

 Carroll Co., July 10, 1909, H. C. Cowles O. fasciculata Nutt. 



3. Flower solitary; calyx-lobes subulate, longer than the tube; parasitic on 

 various plants, not common. May-June. [Anoplanthiis uniflorns (L.) 

 Endl.} O. uniflora L. 



