ERICACEAE. (heath FAMILY.) 325 



24. PTEROSPORA, Nutt risK-DRors. 



Calyx 5-partcd. Corolla ovate, urn-sluiped, r)-tootlio(i, porsistont. Stampns 

 10; anthers 2-celle(l, awned on the hack, openiii;^ lenf^thwise. Style sliort; 

 stigma 5-lobetl. Capsule globose, depressed, 5-lobed, r)-cellod, loculicidal, hut 

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

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

 larger than the body of the seed. — A stout and simple ])urplish-brown 

 clammy-pubescent root-]jarasitic herb (I -2° high) ; the wand-like stem fur- 

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

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

 (Xame from Trrfpou, a icing, and (nropd, seed, alluding to the singular wing 

 borne by the seeds.) 



1 . P. Andromed6a, Nutt. — Hard day soil, parasitic apparently on the 

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



25. SCHWEINITZIA, Kll. Sweet Pine-sap. 



Calyx of 5 ol)long-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, aud 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 iu a terminal spike, at first 

 nodding, flesh-color, with the fragrance of violets. (Named for the late L. D. 

 von Schweinitz.) 



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

 Baltimore) to N. C. April. 



26. MONOTROPA, E. 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 acro.ss the top. 

 Style columnar; stigma disk-like, 4-.5-rayed. Capsule ovoid, 8- 10-grooved, 

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

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

 reddish, 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. (Xame composed of 

 lx6uos, one, and rpSiros, turn, from the summit of the stem turned to one side.) 

 § 1. MONOTRC)PA proper. Plant inodorous, l-jioivered ; cali/x of 2-4 ir- 

 regular scales or bracts; anthers transverse, opening equalli/ hi/ 2 c/iinks; 

 sti/le short and thick. 



1. M. uniflbra, E. (Indian Pipe. Cokpse-Plant.) Smooth, waxy- 

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

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



