ERICACEiE. (heath FAMILY.) 325 



24. PTEROSPORA, Nutt. Pine-drops. 



Calyx 5-parted, Corolla ovate, urn-shaped, 5-toothed, persistent. Stamens 

 10; anthers 2-celled, awned on the back, opening lengthwise. Style short; 

 stigma 5-lobed. Capsule globose, depressed, 5-lobed, 5-celled, loculicidal, but 

 the valves cohering with the columella. Seeds very numerous, ovoid, taper- 

 ing to each end, the apex expanded into a broad reticulated wing many times 

 larger than the body of the seed. — A stout and simple purplish-brown 

 clammy-pubescent root-parasitic herb (1-2° high); the wand-like stem fur 

 nished towards the base with scattered lanceolate scales in place of leaves, 

 above bearing many nodding (white) flowers, in a long bracted raceme. 

 (Name from irrepou, a wing, and airopd, seed, alluding to the singular wing 

 borne by tlie seeds.) 



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

 roots of pines, from \V. New Eng. to N. Penn., N. Mich., and westward ; rare 



25. SCHWEINITZIA, EU. Sweet Pixe-sap. 



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

 rolla 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. Capsule ovoid, 

 5-celled, with a short and thick style, and a large 5-angular stigma. Seeds in- 

 numerable. — 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, with the fragrance of violets. (Named for the late L. D 

 von Scliiveinitz.) 



1. S. odorata, Ell. — Woods, parasitic on the roots of herbs, Md. (near 

 Baltimore) to N. C. April. 



26. MONOTROPA, L. Ixdiax Pipe. Pixe-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. Capsule ovoid, 8- 10-grooved, 

 4 -5-celled, loculicidal; the very .thick placentae covered with innumerable 

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

 red(h'sh, or white, parasitic on roots, or growing on decomposing vegetable 

 matter like a Fun^'us ; the clustered stems springing from a ball of matted 

 fibrous rootlets, furnished with scales or bracts in place of leaves, 1 -several- 

 flowered ; the summit at first nodding, in fruit erect. (Name composed of 

 (xSvos, one, and rp^Tros, turn, from the summit of the stem turned to one side.) 



§ 1. MONOTROPA proper. Plant inodorous, l-Jiowered ; calijx of 2-4 ir- 

 regular scales or bracts; anthers transverse, opening equalli/ bi/ 2 c/n'nks; 

 sti/le short and thick. 

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

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

 rich woods, nearly throughout the continent. June- Aug. (Asia.) 



