272 PYROLACEAE. 



stigma large, capitate; ovary globose, 5-celled; seeds numerous, on 

 the thick axillary placenta. 



Allotropa virgata T. & G. Whole plant dark reddish; stem simple, 

 stout, erect, 30-50 cm. high, 1 cm. or more in diameter, swollen at base; 

 scale-like leaves numerous, especially near the base, the lower ones ovate, the 

 upper lanceolate, attenuate, acuminate; spike dense; bracts linear; sepals 

 erosely dentate. 



In open rather dry coniferous woods, British Columbia to California. A 

 plant of remarkable appearance. 



369. PTEROSPORA. 



Stout simple purplish-brown clammy-pubescent root-parasitic 

 herbs without chlorophyll; stem wand-like, with scattered lanceo- 

 late scales toward the base, in place of leaves; flowers many, 

 nodding, white, in a long bracted raceme; corolla gamopetalous, 

 ovate, urn-shaped, 5-toothed; stamens 10; anthers 2-celled, 

 awned on the back; stigma 5-lobed; capsule globose, flattened, 

 5-lobed, 5-celled; seeds very numerous. 



Pterospora andromedea Nutt. A reddish purple glandular-hairy herb, 

 with straight simple flowering stems, 30—90 cm. high; roots coral-like, much 

 branched; scale-like leaves brownish, scarious, attenuate-lanceolate, largest 

 and most numerous below, 1-3 cm. long; raceme elongated, the flowers nodding 

 on pedicels 1-2 cm. long; bracts small, narrow; flowers white or pinkish, 4-5 

 mm. broad; capsules flattened, globose, 1 cm. wide. 



Coniferous woods in the mountains, usually occurring in colonies. The 

 plants die after blooming. 



370. MONOTROPA. 



White chlorophyll-less herbs which turn black on drying; stems 

 clustered; flowers solitary, nodding, on scapes; sepals 2-4, 

 deciduous; petals 5 or 6 oblong, not saccate, tardily deciduous; 

 stamens 10-12; anthers short, peltate; disk 10-12-toothed, united 

 to the base of the ovary; style short, thick; stigma funnelform, 

 with obscurely crenate margin; ovary 5-celled; seeds minute. 



Monotropa uniflora L. Whole plant bluish-white, rarely pinkish, drying 

 black, glabrous; stems 10-30 cm. high, usually clustered; scale-like leaves 

 scattered, broadly lanceolate, entire; flower nodding; fruit erect. 



Rich woods, rather common. 



371. HYPOPITYS. 



Whitish tawny or reddish chlorophyll-less herbs ; roots a dense 

 mass of fleshy fibers; flowers in a nodding one-sided raceme on a 

 slender scape; sepals and petals 5 in the terminal flower, 3^1 in 

 the lateral ones; petals saccate at the base; stamens 6-10; 

 filaments subulate-filiform; anthers horizontal; disk 8-10-toothed, 

 united to the base of the ovary; style slender; stigma funnelform, 

 its margin glandular-ciliate; ovary 3-5-celled. 



Bracts and sepals merely ciliatc. H. hypopitys. 



Bracts and sepals fimbriate. H. fimbriata. 



