ERICACEAE. (HEATH FAMILY.) ' 267 



very minute, numerous. Smooth perennial herbs, with creeping roots, and 

 evergreen radical leaves. Flowers commonly white, nodding, in a simple raceme 

 at the summit of the nearly naked scape. 



1. P. rotundifolia, L. Leaves orbicular, thick, nearly entire, shorter 

 than the petioles ; racemes many-flowered ; stigma 5-crenate. Dry woods in 

 the mountains, Georgia, and northward. June and July. Scape 1 high. 



16. CHIMAPHILA, Pursh. PRINCE'S PINE. 



Calyx 5-cleft. Petals 5, spreading, deciduous. Stamens 10, the filaments 

 dilated in the middle : anthers somewhat 4-celled, opening by terminal pores, 

 inverted in the bud. Stigma broad, 5-crenate, nearly sessile. Capsule globose, 

 opening from the apex downward ; the sutures naked. Low creeping ever- 

 greens, with erect branches, lanceolate serrate whorled leaves, and whitish 

 umbellate nodding flowers on long peduncles. 



1. C. umbellata, Nutt. Leaves wedge-lanceolate, nan-owed at the base, 

 serrate above the middle, not spotted ; umbels 4 - 7-flowered ; filaments smooth. 

 Open woods, North Carolina, and northward. June. Branches 6' - 10' high. 

 Leaves glossy. 



2. C. maculata, Pursh. Leaves lanceolate. bro*ad at the base, toothed- 

 serrate throughout, blotched with white ; umbels 2 - 5-flowered ; filaments vil- 

 lous below. Dry open woods in the middle and upper districts, Mississippi, 

 and northward. June. Smaller than the preceding. 



17. SHORTIA, Gray. 



Calyx 5-sepalous, scale-like, imbricated in the bud. Capsule shorter than the 

 calyx, nearly globose, 3-celled, loculicidally 3-valved. Placenta large, central. 

 Seeds small, numerous. Embryo terete, straight, shorter than the albumen. 

 Style filiform, somewhat persistent. Corolla and stamens unknown. A 

 smooth perennial nearly stemless herb. Leaves roundish, subcordate, crenate- 

 serrate, long-petioled. Scape scaly -bracted towards the summit, 1 -flowered. 



1. S. galacifolia, Gray. High mountains of Carolina, Michaux. 



SUBORDER IV. MONOTROPEJE. THE INDIAN-PIPE FAMILY. 



18. SCHWEINITZIA, Ell. 



Calyx of 5 sepals, persistent. Corolla persistent, bell-shaped, 5-lobed. Sta- 

 mens 10 : anthers shorter than the filaments, fixed near the apex, awnless ; the 

 cells opening at the apex. Style short and thick : stigma large, 5-angled. 

 Capsule ovoid, 5-celled. Seeds very numerous. Stem low (3' -4'), smooth, 

 brownish, scaly. Spike several-flowered. Flowers flesh-colored, odorous. 



1. S. odorata, Ell. Shady woods, North Carolina, and northward 

 rare. April. Parasitic on the roots of herbs. Flowers nodding. 



