304 ERICACEAE. (HEATH FAMILY.) 



cent ro^-parasitic herb (l°-2° high) ; the wand-like stem furnished towards 

 the base with scattered lanceolate scales in place of leaves, above bearing many 

 nodding (white) flowers, resembling those of Andromeda, in a long bracted ra- 

 ceme. (Name from rrrepov, a wing, and anopd, seed, alluding to the singular 

 wing borne by the seeds.) 



1. P. AndrOHiedea, Nutt. — Hard clay soil, parasitic apparently on the 

 roots of pines, from Vermont, Peekskill and Albany, N. Y., and N. Pennsylvania 

 northward and westward : rare. 



27. SCHWEINITZIA, Ell. Sweet Pine-sap. 



Calyx of 5 oblong-lanceolate acute scale-like sepals, erect, persistent. Corolla 

 persistent, bell-shaped, rather fleshy, 5-lobed, slightly 5-gibbous at the base. 

 Stamens 10 : anthers much shorter than the filaments, fixed near the summit, 

 awnless ; the two sac-shaped cells opening at the top. Pod ovoid. 5-celled, with 

 a short and thick style, and a large 5-angular stigma. Seeds innumerable. — 

 A low and smooth brownish plant, 3' -4' high, with the aspect of Monotropa, 

 scaly-bracted, the flowers several in a terminal spike, at first nodding, flesh-color, 

 exhaling the fragrance of violets. (Named for the late L. D. von Schtveinitz.) 



1 • S. odorata, Ell. — Woods, parasitic on the roots of herbs, Maryland 

 and southward : rare. April. 



28. MONOTROPA, L. Indian Pipe. Pine-sap. 



Calyx of 2-5 lanceolate bract-like scales, deciduous. Corolla of 4 or 5 sep- 

 arate erect spatulate or wedge-shaped scale-like petals, which are gibbous or 

 saccate at the base, and tardily deciduous. Stamens 8 or 10: filaments awl- 

 shaped : anthers kidney-shaped, becoming 1 -celled, opening across the top. 

 Style columnar : stigma disk-like, 4 - 5-rayed. Pod ovoid, 8 - 10-grooved, 4-5- 

 celled, loculicidal : the very thick placentas covered with innumerable minute 

 seeds, which have a very loose coat. — Low and fleshy herbs, tawny, reddish, or 

 white, parasitic on roots, or growing on decomposing vegetable matter like a 

 Fungus ; the clustered stems springing from a ball of matted fibrous rootlets, 

 furnished with scales or bracts in place of leaves, 1 - several-flowered ; the flow- 

 ering summit at first nodding, in fruit erect. (Name composed of povos, one, 

 and Tponos, turn, from the summit of the stem turned to one side. ) 



§ 1. MONOTROPA, Nutt, Plant inodorous, with a single 5-petalled and 10-an- 

 drous flower at the summit ; the calyx of 2-4 irregular scales or bracts: anthers 

 transverse, opening by 2 chinks : style short and thick : stigma naked. 

 1. M. unifl6ra, L. (Indian Pipe. Corpse-Plant.) Smooth, waxy- 

 white (turning blackish in drying, 3' -8' high); stigma naked. — Dark and 

 rich woods : common. June - Aug. 



§ 2. HYPOPITYS, Dill. Plant commonly fragrant : flowers several in a scaly 

 raceme; the terminal one usually 5-petalled and 10-androus, while the rest are 4- 

 petalled and 8-androus ; the bract-like sepals mostly as many as the petals : anthers 

 opening by a continuous line into 2 very unequal valves, the smaller one erect and 

 appearing like a continuation of tlie fllament : style longer than the ovary, Ivollow. 



