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182
POLEMONIUM sibiricum.
Bipinnate-leaved Greek Valerian.
Natural Order. P o l e m o n i a c e i E . D. Don in Edinb. phil.
journ. Oct. 1822.
P O L EM O N IU M . Ca/i/x campannlatus, 5-fidus. Corolla rotata,
limbo 5-loba, erecta. Stamina in fauce inserta: filamenta
basi barbata, in annulam contigua etfaucemferè claudentia. Capsula
subrotunda: loculis polyspermis : valvis membranaceo-crus-
taceis. Semina oblonga, subtrigona, albumine magno prsedita.
Radícula cotyledonibus duplo longior!—Hertira perennes {Amer.
bor. Europ. et-Sibir.) Folia alterna, impari-pinnata aut rarius
{in P . sibirico) bipinnata: foliolis integerrimis. Flores numerosi
in corymbus pluribus pardculatirn digesti, pulchri, ccerulei vel rarius
albi. D. Don. 1. c. p. 5.
P . sibiricum, foliis bipinnatis pubescentibus : foliolis lineari-lan-
ceolatis acutis, corymbis paniculatis congestis, calycibus villosis,
laciniis corollæ lato-ovatis acutis.
Polemonium sibiricum. D. Don. loc. cit. p. 5. Siot. hort. brit.
p . 285.
Perennial, herbaceous. Stems sevefal from the same
plant, erect, from a foot to 18 inches in height; pubescent
when young, but becoming smooth, angular. Leaves
pinnate, hairy when young, but becoming smooth afterwards
; leaflets opposite or alternate, crowded, variable,
pinnate or pinnatifid, with long naked footstalks; lower,
ones broader, generally simple, or 2 or 3-cleft; the leaflets
or segments linearly lanceolate, acute, generally entire,
but sometimes forked. Petioles deeply channelled
on the upper side, and keeled on the lower; widened
near the base, and continuing with a slight wing on each
side down the stem, pubescent. Flowers white, terminating
the stem in a croAvded panicle. Peduncles in a
close corymbus. Pedicles short, crowded, and clothed
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