ERICACEAE. (HEATH FAMILY.) 325 



24. PTEROSPORA, Nutt. PINE-DROPS. 



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

 10; anthers 2-ceUed, 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 irrfpov, a iciiy, and criropd, seed, alluding to the singular wing 

 borne by the seeds.) 



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

 roots of pines, from W. New Eug. to N. Peun., N. Mich., and westward ; rare. 



25. SCHWEINITZIA, Ell. SWEET PISE-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, awuless ; 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 Schweinitz.) 



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

 Baltimore) to N. C. April. 



26. 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- 

 sliaped ; 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, 

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

 fj.6fos, one, and rp6iros, turn, from the summit of the stem turned to one side.) 



1. MONOTROPA proper. Plant inodorous, 1-floivered ; calyx of 2-4 ir- 

 regular scales or bracts; anthers transverse, opening equally by 2 chinks; 

 style short and thick. 



1. M. uniflbra, 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.) 



