346 POLEMONIACEJE. (POLEMONIUM FAMILY.) 
seteLcea, L.) — Dry rocky hills and sandy banks, from New Jersey 
and Michigan southward. April, May. — Common in gardens: form¬ 
ing low and matted nearly prostrate tufls, very handsome in blossom, 
being nearly covered with flowers. 
P. Drummondii, Hook., a very showy Texan annual species, is be¬ 
coming common in cultivation. 
Order 75. DIAPEN SI ACE JG. (Diapensia Family.) 
Dwarf and tufted somewhat shrubby plants (only two in 
number), with small and evergreen heath-like foliage; the 
fruit agreeing with Polemoniacese, as do the flowers , except 
in the following points , viz. Calyx of 5 separate and 
strongly imbricated persistent sepals, like the bracts. Sta¬ 
mens 5, inserted in the very sinuses of the bell-shaped co¬ 
rolla : filaments short and flat: anthers opening transversely 
across the cells on the inside. Style single: stigma minute¬ 
ly 3-lobed. 
1. diapensia, L. Diapensia. 
Anther-cells oblong, pointless, opening by an obliquely trans¬ 
verse line. Pod several-seeded. — An alpine dwarf evergreen, 
growing in very dense convex tufts, with the steins imbricated 
below with cartilaginous narrowly spatulate leaves, terminated by 
a nearly naked scape-like 1-flowered peduncle. Corolla white. 
(The ancient Greek name of the Sanicle, of obscure meaning, 
strangely applied by Linnaeus to this plant.) 
} D. Lapponica, L. —Alpine summits of the White Moun¬ 
tains, New Hampshire, and Essex Mountains, N. New York. W* 
— Corolla open bell-shaped, broad. 
2 - PYXIDANTHEBA, Michx. Pyxidanthera. 
Anther-cells pointed at the base, opening by a strictly trans¬ 
verse line. Pod several-seeded. — A small prostrate and creeping 
evergreen, with narrowly oblanceolate and awl-pointed crowded 
leaves, which are alternate on the sterile branches, and somewhat 
hairy near the base. Flowers solitary and sessile, numerous, 
white or pale rose-color. (Name from w§is, a small box , and £r 
%o, anther, the anther opening as if by a lid.) 
