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A S C L E P IA S virgata.
Twiggy Sivallow-wort.
Linnean Class and Order. P E N T A N D R IA D IG Y N IA .
Natural Order. A S C L E P IA D EÆ . Brown in Wern. trans. 1. p . 12.
A S C L E P IA S . Supra folio 18, series 2.
A . virgata, foliis oppositis breve petiolatis lineari-lanceolatis acutis ; supra
glabris nitidis ; subtus nervis pubescentibus, caule erecto pubescente,
umbellis plurifloris inter foliis, petiolis pedunculis pedicellis calycibusque
pubescentibus.
Asclepias virgata. La Case. gen. et spec. nov. aut minus cognit. 1815. p. 14.
Balbis in catal. taurin. 1813. p . 14. D C . catal. taur. 1813. cx R . S.
Rcem. et Schult. syst. 6. p . 72. Swt. hort. brit. edit. 2. p . 360.
Perennial, erect. Stems rather slender, erect, slightly pubescent,
becoming smooth by age, somewhat branched :
branches slender, pubescent. Leaves opposite, lanceolate, linearly
lanceolate, or linear, acute, the longest in our specimens
five inches in length, and the broadest half an inch in
breadth, also tapering towards the base, of a glossy green,
and smooth on the upper side, underneath penniveined, of
a paler colour, the nerves pubescent: upper ones becommg
gradually narrower than the lower ones. Petioles short,
slightly pubescent, furrowed on the upper side, and rounded
below. Peduncles produced from the stem, intermediate between
the two leaves; pubescent, lengthening after the expansion
of the flowers. Lnvolucre of numerous small slender
bractes, that are three or four times shorter than the pedicles,
subulate, acute, and pubescent. Umbels in our specimens
from 16 to 24-flowered. Pedicles straight, erect, or
spreading, about half an inch in length, of a purplish brown,
pubescent. U/ozceri blush and white. Ca/r/.r deeply 5-parted,
pubescent: segments broadly lanceolate, acute, pubescent,
closely pressed to the corolla. Lorolla deeply 5-parted, the
segments spreading, narrowly ovate, scarcely acute, blush
or pale purple. Stamineous croivn of five erect, hollow, tubularly
CLicullate, white leaflets, each bearing a subulate horn
VOL. T. Z
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