282 XCII. ACANTHACES. 
SuporpEr 2. Ruellidez. (Gen. 2-6.) 
2. CALOPHANES, Don. 
Calyx very deeply 5-cleft, the segments setaceous. Corolla 
funnel-shaped ; limb 5-fid, subregular. Stamens 4, didynamous, 
or 2; anthers 2-spurred at base or pointless, cells parallel, 
flat, membranous. Capsule lanceolate, 4-seeded in the middle. 
DC. Prod. xi. p. 107. Also Chetacanthus, DC. l.c. 462; Li- 
nostylis, Sond. in Linn. xxiii. p. 94. 
Herbs or rigid halfshrubs. Leaves small. Flowers opposite, axillary, 
sessile, with 2 subulate bracts at base.—5 South African species, natives of 
Eastern district and Natal. 
3. RUELLIA, Linn. 
Calyx 5-parted, the segments equal or unequal, linear. 
Corolla funnel-shaped, the tube subcampanulate upwards ; 
limb bluntly 5-lobed, subequal. Stamens 4, didynamous, not 
longer than the corolla; anthers oblong, 2-celled, cells parallel, 
equal, pointless or mucronate at base. Stigma subulate, with 
a tooth at base, or 2-lamellate. Capsule tumid above, 6—8-16- 
seeded.—DC. Prod. xi. p. 143. Also Fabria, E. W.; DC. 1. ce. 
p. 113. 
Herbs or undershrubs, pubescent or hairy. Flowers axillary, solitary, 
spiked or capitate, with small bracts.—4 South African species, Kastern. 
4, PETALIDIUM, N. ab EH. 
Calyx equal, deeply 5-parted, enclosed in 2 large, veiny, 
valvate, boat-shaped bracts. Corolla funnel-shaped, the limb 
subequally 5-fid. Stamens 4, didynamous, included ; anthers 
oblong, the cells parallel, mucronate at base. Stigma 2-fid, 
the lobes linear. Capsule shortly compressed at base, 4-seeded 
in the middle ; septum persistent.—Thes. Cap. t. 143. 
P. linifolium, T. Andr., the only South African species, is a rigid, gla- 
brous, branching shrub, with narrow linear, acute leaves, and axillary, pe- 
dunculate flowers, each sitting in a pair of boat-shaped, papery membra- 
nous bracts, netted over with slender, green veins.— Found in Damaraland 
by Mrs. Kolbe. 
5. PSEUDOBARLERIA, T. Anders. 
Bracts 2, opposite, large, covering the calyx and corolla in 
bud, and the capsule. Calyx 4-parted, the upper and lower 
seoments larger, lateral smaller, subulate. Corolla funnel- 
shaped; tube constricted, longer than the equally 5-lobed 
limb ; lobes short, with twisted wstivation. Stamens 4, in- 
cluded; filaments equal, inserted in the throat, connate in 
pairs at base ; anthers 2-celled, sagittate, cells mucronate at 
base. Stigma subulate, shortly 2-lobed at base, slightly revo- 
