CXXII. ORCHIDACEA. 3861 
7, ANGRAECUM, Pet. Th. 
Perianth spreading; the sepals and petals subequal, free. 
Labellum sessile, continuous with the base of the column, 
fleshy, undivided, much wider than the petals, prolonged at 
base into a subeylindrical spur, usually much longer than the 
perianth. Coluimn small, rarely elongate, semiterete. An- 
ther 2-celled, truncate. Pollinia 2, 2-parted, with a narrow, 
short caudicle and triangular gland.—Lindl. Orch. p. 245; 
Harv. Thes. t. 107, 108. 
Caulescent epiphytes, with coriaceous, ligulate leaves, oblique at apex. 
Flowers solitary or racemose, mostly white.—Several Cape species, in 
Eastern district and Natal. 
8. MYSTACIDIUM, Lindl. 
Perianth spreading ; the sepals and petals subequal, petaloid. 
Labellum with a very long, filiform spur, and undivided limb, 
jointed to the base of the column. Column short, straight, 
fleshy, semiterete, furnished at the apex, on each side, with a 
linear process. Rostellum ovate, elongate, convex, nude. 
Anther membranous, 2-celled. Pollinia 2, hollow-backed, with 
a long, 2-legged caudicle ; the filiform legs each attached to a 
peltate gland. Lindl. in Hook. Comp. Bot. Mag. ii. p. 205; 
Harv. Thes. t. 173, 174, 175. 
Epiphytes, with the habit of Angrecum. Spurs of the labellum very 
long and slender.—3 species, natives of Eastern district and Natal. 
9. CALANTHE, R. Br. 
Perianth expanded, free, or the lateral sepals slightly at- 
tached to the labellum, subequal. Labellum connate with the 
column, lobed or entire, spurred or hornless, with the disk 
lamellate or tubercled. Column short, the rostellum mostly 
beaked. Pollinia 8, much attenuate at base, adhering in fours 
to a 2-partible gland.—Lindl. Orch. p. 249. 
Terrestrial plants, with erect, many-flowered scapes. Leaves broad, 
plaited. Flowers white or lilac, rarely yellow.—1 species, C. sylvatica. 
found at Natal. 
Trise 3. OpurypEsx. (Gen. 10-89.) 
10. HOLOTHRIX, Rich. 
Sepals converging, equal. Petals free, spreading, larger 
than the sepals. Labellum spurred, connate with the column, 
lobed, concave. Anther erect, with parallel cells. Glands of 
the pollinia in two separate hoods.—Lindl. Orch. p. 283. 
Small herbs, with 1-2 radical leaves ; a nude scape and minute, greeu or 
greenish flowers.—4 or 5 species, dispersed, 
