154 ORCHIDS OF THE CAPE PENINSULA. 
the glands approximate near the apex, tuberculate on either side near 
the middle. — Thunberg, Flor. Cap., ed. 1828, p. 18; Satyriwm cylin- 
dricum, Thunberg, in Prodr. Plant. Capens. (1794), p. 5. 
Has. On the lower plateau of Table Mountain, above Klassenbosch, &c., 
2400—3500 (?) ft.; fl. Oct—Jan.; Bolus, 4537. 
This species seems to vary considerably in the density and number 
of flowers on the spike, in the size of the flowers, and in the length of 
the odd sepal and its spur, in some forms the latter becoming almost 
obsolete, while at its longest it is only shortly conical. Usually the 
whole plant, stem, leaves, and flowers, is of a uniform dull-yellow 
tinge; sometimes, but less commonly, it is a bright sap-green; the 
surface is minutely papillate, and hence slightly rough to the touch. 
The rostellum is somewhat different from that of any other species, 
and the perianth appears to form a connecting-link between this and 
the section Monadenia. 
There has been some confusion between this species and D. bracteata, 
Swartz. The latter is thus characterised (Kongl. Vet. Acad. Handl., 
XXl., p. 211) :—‘‘ Galea obtuse, spur oblong, deflexed ; lip linear, wider 
at the apex; spike cylindrical; bracts erect, longer than the flowers.” 
But there is no specimen extant in Thunberg’s or Swartz’s herbarium; 
and the words ‘“‘ spur oblong, deflexed”’ emphatically separate it from 
all forms of the present plant, of which a type exists in Thunberg’s 
herbarium, and which well agrees with the original expression in 
Thunberg’s ‘Prodromus,’ p. 5, under Satyrium cylindricum, “ galea 
unicallosa.” Lindley figured, in the ‘ Botanical Register,’ vol. iv., 
t. 824, what he regarded as Disa bracteata, Swartz, from the latter’s 
description. The figure shows a plant clearly belonging to the section 
Monadenia, and it is probable that, whether Lindley named it rightly 
or not, Swartz’s D. bracteata did belong to that section. 
20. Disa lineata, Bolus, in Journ. Linn. Soc., vol. xxii. (1885), p. 74. 
—Glabrous, erect, 3 in. to a span high; stem laxly leafy; leaves 5-6, 
linear-lanceolate, acute, sheathing at base, ascending, 1-8 in. long, the 
upper passing into bracts; spike moderately-crowded, from one-third 
to half the height of the plant, 6-20-flowered; bracts ovate-lanceolate, 
acuminate, spreading-erect, mostly a little shorter than the flowers; 
flowers, with the ovary, about 7 lines long; side sepals lanceolate, sub- 
obtuse, at first spreading, but shortly erected, and closely appressed to 
the odd sepal, 34 lines long; odd sepal somewhat funnel-shaped, erect, 
acute, obtuse at the base (neither saccate nor spurred), with a narrow 
mouth, the margin somewhat wavy, 4-44 lines long; petals oblong, 
falcately incurved, turned backwards, toothed at the apex, 24 lines 
long; lip lanceolate, acute, crenulate or entire, 24 lines long, at first 
spreading, then shortly retracted within the galea, and closely covering 
