ERICACEAE. (HEATH FAMILY.) 231 



Var. Uliginosa, Gray. Calyx-lobes shorter, usually broadly ovate, some- 

 times obtuse leaves from subcordate to obovate, generally dull : flowers rose- 

 colored or purple. Cold bogs, nearly across the continent to the north. 



6. P. picta, Smith. Leaves Jinn-coriaceous, dull, commonly veined or 

 blotched with white above, pale or sometimes purplish beneath, 1 to 2^ inches 

 long, from broadly ovate to spatulate or narrowly oblong, all longer than the 

 petiole, the margins quite entire or rarely remotely denticulate : scapes a span 

 or more high, 7 to 15-flowered : bracts few and short : calyx-lobes ovate, not 

 half the length of the greenish-white petals. Wyoming and S. Utah to 

 California and northward. 



9. PTEROSPORA, Nutt. PINE-DROPS. 



Calyx deeply 5-parted. Corolla globular urn-shaped. Stamens 10, in- 

 cluded. Disk none. Stigma 5-lobed. Capsule depressed-globular, 5-lobed. 

 Seeds innumerable, broadly winged from the apex. 



1. P. andromedea, Nutt. A chestnut-colored or purplish herb, glandu- 

 lar and clammy-pubescent : simple stem 1 to 3 feet high, bearing small and 

 scattered lanceolate scales: raceme long and many-flowered: corolla white, 

 inch long, somewhat viscid. Under pines and oaks from Colorado to Cali- 

 fornia northward, and eastward across the continent. 



10. MO NOT HO PA, L. INDIAN PIPE. PINE-SAP. 



Sepals of 2 to 5 lanceolate bract-like scales. Petals scale-like and fleshy, 

 gibbous or saccate at base. Stamens 8 to 12. Disk 8 to 12-toothed, the 

 teeth deflexed. Stigma funnelform, with obscurely crenate margin. Cap- 

 sule ovoid. White, tawny, or reddish scaly and fleshy herbs, the clustered 

 stems rising from a thick and matted mass of fibrous rootlets, one to several- 

 flowered. 



* Plant inodorous, one-flowered : scales passing into an imperfect or irregular calyx 



of 2 to 4 loose sepals or perhaps bracts: anthers opening at jirst by 2 transverse 

 chinks, at length 2,-valved ; the valves almost equal and equally spreading: 

 edge of the stigma naked. 



1. M. uniflora, L. Smooth, a span or so high, waxy-white (blackish in 

 drying), rarely flesh color: flower nodding, f inch long: petals 5, rarely 6. 

 Damp woods, nearly throughout the continent. "Indian Pipe." 



* * Plant often scented, commonly pubescent, at least above, raccmoselt/ 3 to 



several -flowered : terminal flower earliest and usually 5-merous and the lateral 

 3 to 4-merous: sepals less bract-like, as many as (he petals; the latter saccate 

 at base : anthers more remform ; the cells completely confluent into one, which 

 opens by very unequal valves, the larger broad and spreading, the other remain- 

 ing erect and contracted : stigma glandular or hairy on the margin. 



2. M. Hypopitys, L. A span or at length a foot high, tawny or flesh- 

 colored : scales and bracts entire or slightly erose : flowers less than inch 

 long ; the lateral 4-petalous and 8-audrous. Under coniferous trees from 

 Oregon to Canada and Florida. ' Pine-sap." 



