170 
ARETHUSA bulbosa. 
Bulbous Arethusa. 
GYNANDRIA MONANDRIA Nat. Ord. ORCHIDEM. 
Gen. Char. — Labellum inferne cum columna adnatum ; superne cuculla- 
tum; intus cristatum. Petala mutica, basi connata. Pollen angula- 
tum.— -Br. 
Arethusa bulbosa. 
Arethusa bulbosa. Linn. Sp, PI. v. ii. p. 1346. — Willd. Sp. PL v. iv. p. 80. 
— PuRSH, Fl. N. Am. V. ii. p. 591. — Br. in Hort. Kew. ed. 2. v. 5. p. 205. 
Root a small roundish solitary tuber, with a few brownish fibres. Stem 
8 or 1 0 inches high, slender, erect, simple, terete, glabrous ; sheathed 
from the base above the middle with 3 or 4 rather short obtuse leaves ; 
one or two of the upper are alone sometimes extended into an acumi- 
nated portion, distinct from the sheath. 
Flower terminal, solitary, rarely two together, at the extremity of the stem j 
large, upright, fragrant. Petals 5, oblong, broadest upwards, subacute, 
of a beautiful rose colour, subconcave, slightly incurved, the 2 inner- 
most most so ; all of them incorporated below, meeting in the front at the 
very base, and there forming a short gibbous process or spur. Labellum 
springing from within this spur, at first rising erect, then deflexed in 
its upper half, bifid at the point, minutely crenato-serrate at the mar- 
gin ; the colour whitish, beautifully marked with purple anastomosing 
lines, and crested with 3 yellow pubescent lines. Column long, linear, 
greenish, its base united with the base of the petals, its extremity di- 
lated, slightly lobed and serrated, membranous, purplish, incurved. 
Stigma projecting on its upper part, on which projection the subcorn- 
eal anther is situated, fixed, however, by a point on its back to the di- 
lated portion of the column ; greenish, its base yellow, 2-celled, each 
cell containing two subovate, compressed pollen-masses, composed of 
numerous, yellow, subelastically cohering granules. Germen very 
short, columnar, greenish-purple ; with a small ovate bractea at the 
back. 
VOL. III. 
