208 FOUNDATIONS OF BOTANY 



limb somewhat oblique, its lower lobe notched. Pod rather stout. 

 Rich, damp woods, especially S. W. ; often cultivated. 



91. OROBANCHACE^. Broom-rape Family. 



Leafless brownish root-parasites. Kootstock often tuberous, 

 naked or scaly. Stem usually stout, solitary, scaly. Flowers 

 spiked or racemed. Sepals 4-5, free from the ovary. Corolla 

 hypogynous, irregular, the tube curved; the limb 2-lipped. 

 Stamens 4, 2 long and 2 short, inserted on the corolla-tube ; 

 anthers 2-celled, the cells spurred at the base. Ovary 1-celled, 

 of 2 carpels, stj^le simple, stigma 2-lobed ; ovules many. Cap- 

 sule 1-celled, 2-valved, few-many-seeded ; seeds very small. 



I. CONOPHOLIS, Wallroth. 



Stems often clustered, stout, covered with scales which 

 overlap, the uppermost ones each with an axillary flower, 

 thus forming a spike. Calyx irregularly 4-5 cleft, split down 

 the lo}ver side. Corolla swollen below, decidedly 2-lipped, the 

 upper lip arched. Stamens projecting. 



1. C. americana, Wallroth. Squaw-root, Cancer-root. Stems 

 3-6 in. high, yellowish or yellowish-brown. Flowers numerous, in- 

 conspicuous. Corolla dhty white or pale brown. In oak woods, 

 not very common. 



n. APHYLLON, Mitchell. 



Brownish or whitish plants with naked scapes borne on 

 scaly, mostly underground stems. Calyx regular, 5-cleft. 

 Corolla 5-lobed, slightly irregular. Stamens not projecting 

 from the corolla-tube. 



1. Aphyllon uniflorum, Gray. One-flowered Cancer-root. 



Slightly covered with clammy down. Stems very short-branched, 

 each with 1-3 1-flowered scapes 3-5 in. high. Cah-x-lobes lance- 

 awl-shaped, half as long as the corolla. Corolla yellowish-white, 

 veiny, purple-tinged, palate with 2 yellow bearded ridges. Damp 

 woods. 



2. A. fasciculatum, Gray. Stem scaly, upright, 3-4 in. high above 

 ground and generally longer than the numerous 1-flowered pedun- 

 cles. Calyx-lobes short, triangular. Parasitic on wild species of 

 Artemisia, etc., in sandy and loamy soil N. W. and W. 



