DISA. 1738 
Herschelia group, but the galea has a different and peculiar set 
and shape. As it is pretty common and flowers at about the same 
time as D. uniflora and D. graminifolia, it is a general favourite and 
much gathered for bouquets. On the mountains of the eastern 
districts (Cockscomb, Boschberg, Koudveld, &c.), this species appears 
to be replaced by the allied D. Zeyheri, Sonder, which is often mis- 
taken for it. Reichenbach, the younger, in his ‘ Die Orchideen des 
Herbars Thunbergs’ (Separat-Abdruck aus “Flora,” in 1883, No. 29), 
says that the latter species is the same as D. ferruginea. But, 
according to Mr. N. E. Brown, who also examined Thunberg’s 
Herbarium, this identification only applies to the plants on one of the 
two sheets marked D. ferruginea. D. porrecta, Swartz, l.c., p. 211, 
must be a closely-allied species. Harvey (in Hook. Lond. Journ. Bot., 
vol. i. (1842), p. 15), believed that D. ferruginea and D. porrecta were 
identical, but there is no sufficient ground for this conjecture. Swartz 
describes them as different, and it is quite possible that D. porrecta, 
which was collected by Sparrman, was not gathered on Table Mountain 
at all. It no longer exists in Thunberg’s herbarium, but we are bound 
to suppose that it is a good species which is rare, and which may yet 
be re-discovered, as so many others have been. 
§ 10. Amphigena. 
46. Disa tenuis, Lindley, in Gen. d Sp. Orch. (1888), p. 354.— 
Glabrous, erect, slender, 8-14 in. high; scape bent, leafless, clothed 
with distant sheaths terminating in fine hair-like spreading points; 
leaves 2-4, radical, tufted, narrow-linear, enclosed in a leaf-like sheath 
at the base, 3-4 in. long, appearing before the flowers and withered 
when they bloom; spike variable, mostly densely-flowered, 2-4 in. 
long, sometimes lax and distantly flowered; bracts ovate, acuminate, 
with long bristle-points, of variable length but mostly as long as the 
flowers ; side sepals oblong, obtuse, suddenly contracted into a bristly 
point, about 14 lines long; odd sepal somewhat galeate, ascending or 
erect, acuminate, with a short conical, obtuse, ascending spur, the 
whole 24 lines long; petals erect, oblong, incurved at the top, 
serrulate on the front margin, little more than 4 line long; lip linear, 
acute, serrulate, nearly 1 line long, or narrower and entire, 1+ lines 
long; caudicles of the pollinia ending in a single, large, nearly square 
gland; rostellum low, without arms or ridges at the side; stigma 
depressed, margined. D. leptostachys, Sonder, in Linnea, vol. xix. 
(1847), 98. 
Hazs. Amongst shrubs on the eastern slopes of the Devil’s Peak, between the 
King’s Blockhouse and the Waterfall, at about 1400 ft.; fl. May, 4. A. Bodkin, (in 
herb. Bolus, 4874). Same place, Dr. Pappe (in the Cape Govt. Herb.), Also on the 
Flats, near Claremont, MacOwan, 2566 ; Kenilworth, near the Race-course, Bolus, &c., 
not common.—Extends eastward to Houw Hoek Mt., 1200—2000 ft.; fi. April, Bolus. 
2H 
