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 (!' 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. biflda, Beck. Stems ascending, branched (5' - 8' high) ; leaves linear, 

 becoming nearly glabrous ('-1^' 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-cfeJl 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 tufted in broad mats, the short flowering slioots ascending, 

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



10. P. subulata, L. (GROUND or Moss PINK.) 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 cejls 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. D. Lapponica, L. Alpine summits of the White Mountains, New 

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



4. PYXIDANTHERA, 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 TTUI'S, 

 a small box, and av6r)pa, anther, the anther opening as if by a lid.) 



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

 ward. April, May. 



