POLEMONIACE^E. (POLEMONIUM FAMILY.) 373 



southward. May, June. — Flowers showy : tube of the corolla an inch long; 

 the limb nearly as broad. 



8. P. divaricata, L. Stems spreading or ascending from a decumbent 

 base (9' -18' high) ; leaves oblong-ovate or the lower oblong-lanceolate (1|' long), 

 acutish; cyme corymbose-panicled, spreading, loosely-flowered; peduncles slen- 

 der; calyx-teeth slender awl-shaped, much longer than the tube; lobes of the pale 

 lilac or bluish corolla obcordate or wedge-obovate and notched at the end, or often entire 

 (var. Laphamii, Wood), |' - §' long, equalling or longer than the tube, with rather 

 wide sinuses between them. — Rocky damp woods, mountains of Virginia to N. 

 New York, Wisconsin, and northward. May. 



9. P. bifida, Beck. Stems ascending, branched (5' -8' high) ; leaves linear, 

 becoming nearly glabrous (^'-H' long, 1^" wide) ; flowers few, on slender pe- 

 duncles; calyx-teeth awl-shaped, about the length of the tube; lobes of the pale 

 purple corolla 2-clefi to or below the middle (4" long), equalling the tube, the divis- 

 ions linear oblong. — Prairies of Illinois, Mead (and Missouri). May. 



* * * * Stems creeping and tujled in broad mats, the short flowering shoots ascending, 

 glandular-pubescent ; the rigid narrow leaves crowded and fascicled. 



10. P. subulata, L. (Ground or Moss Fink.) Depressed, in broad 

 mats; leaves awl-shaped, lanceolate, or narrowly linear (3" -6" long); cymes 

 few-flowered ; calyx-teeth awl-shaped, rigid ; corolla pink-purple or rose-color 

 with a darker centre (sometimes white) ; the lobes wedge-shaped, notched, rarely 

 entire. (P. setacea, L.) — Dry rocky hills and sandy banks, S. New York to 

 Michigan and southward. April, May. — Common in cultivation. 



3. DIAPENSIA, L. Diapensia. 



Calyx of 5 concave imbricated sepals. Corolla bell-shaped, 5-lobed ; the lobes 

 rounded. Filaments broad and flat, adherent to the corolla up to the sinuses, 

 short: anthers adnate, of 2 ovoid pointless cells, diverging below, each opening 

 therefore by a transverse-descending line. Pod enclosed in the calyx, cartilagi- 

 nous ; the cells few-seeded. — An alpine dwarf evergreen, growing in very dense 

 convex tufts, with the stems imbricated below with cartilaginous narrowly spat- 

 ulate mostly opposite leaves, terminated by a scape-like 1 -flowered peduncle, 

 3-bracted under the calyx. Corolla white (^' wide). (Ancient Greek name of 

 the Sanicle, of obscure meaning, strangely applied by Linnaeus to this plant.) 



1. Dc Lapponica, L. — Alpine summits of the White Mountains, New 

 Hampshire, and Adirondack Mountains, N. New York. July. (Eu.) 



4. PYXIDANTHEEA, Michx. Pyxidanthera. 



Anther-cells awn-pointed at the base, opening by a strictly transverse line. 

 Otherwise much as in Diapensia. — A small prostrate and creeping evergreen, 

 with narrowly oblanceolate and awl-pointed crowded leaves, which are mostly 

 alternate on the sterile branches, and somewhat hairy near the base. Flowers 

 solitary and sessile, very numerous, white or rose-color. (Name from ttv^is, 

 a small box, and dvdfjpa, anther, the anther opening as if by a lid.) 



1. P. barbulata, Michx. — Sandy piue barrens of New Jersey and south- 

 ward. April, May. 



