12 ACANTHACE® (Clarke), [ Ruellia. 
Section Fabria, divided nearly to the base or only half-way. 
Corolla {—2 in. long, purplish or white, not 2-lipped ; tube linear- 
oblong or dilated nearly from the base; lobes contorted in bud. 
Stamens 4, subsimilar; anther-cells 2, parallel, nearly at equal height, 
not spurred at the base ; pollen globose, surface reticulate or honey- 
combed. Style linear, with one linear-oblong branch, the other 
suppressed ; ovary with 6-16 ovules, glabrous or hairy. Capsule 
cylindric, narrowed and solid at the base, usually perfeeting more than 
4 seeds in the clavate upper part. Seeds on prominent retinacula, 
with many hygroscopic hairs on their margin. 
Undershrubs; leaves nearly or quite entire, full of cystoliths, which are also 
conspicuous in the calyx ; flowers axillary, not running into strobilate spikes, 
Species 150 in the warm and temperate parts of both hemispheres, especially 
numerous in America, 
R. spinescens and R. depressa, Thunb. Prod. 104, are referred to Aptosimum, 
among Scrophulariacee. 
Section 1. Diprrracanruvs. Calyx equally 5-fid, 
Calyx divided nearly to the base: 
Bracteoles spathulate-elliptic : 
Leaves 4-1} in. long, tip triangular... ..» (1) patula. 
Leaves {-$ in. long, tip rounded nee ««- (2) Zeyheri. 
Bracteoles parrow-oblong ; leaves 2 in. long + (3) Baurii. 
Calyx-tube 4 as long as the teeth... vi -» (4) Woodii. 
Section 2, Faprta. Calyx obscurely 2-lipped, viz. 2 teeth 
free nearly to the base, 3 teeth connate (sometimes nearly to 
the middle). 
Thinly hairy ; leaves ovate or cordate at the base +. (5) ovata, 
Densely and softly hairy ; leaves elliptic, narrowed into 
the petiole sin in si se - (6) malacophylla, 
Softly hairy ; leaves linear-oblong Ses ise -- (7) stenophylla, 
1. R. patula (Jacq. Mise. Bot, ii. 358) ; a small shrub, pubescent 
or nearly glabrous; branches 6-18 in. long; leaves 1~12 in, long, 
ovate or elliptic, tip obtusely triangular, base suddenly narrowed ; 
petiole 2-1 in. long; flowers axillary, solitary or a few clustered, 
grey-purple or more often white; bracteoles 37s In. long, spathulate- 
elliptic ; ealyx 2 in. long, divided to the base 3 teeth equal, linear ; 
corolla $-12 in. long; tube much inflated ; stamens and pollen of 
the genus; ovary glabrous ; Style thinly hairy ; capsule }—2 in. long. . 
Jacq. Ic. Pl. Rar. i, 12, ¢. 119; T. Anders. in Journ. Linn. Soe. 
vi. 24;.C. B. Olarke in Hook. f. Fl. Brit. Ind. iv. 412, and in 
Dyer, Fl, Trop. Afr. v. 45 3 Lindau in Engl. & Prantl, Pflanzenfam. 
iv. 3B, 310, fig. 124 E, F, in Engl. Jahrb. xviii. 63, ¢ 1, fig. 24, and in 
25 from deser. ipteracanthus patulus, Nees in Wall. Pl. Asiat. Rar. 
lil, 82, and in DC. Prod. xi. 126; Wight, Ie. Pl. Ind. Or. t. 1505 ; 
Ocrsted in Vidensk, Meddel. Kjob. 1854, 180, ¢, 4, Jigs. 19-21, 
Coast Reaion: Albany Div, ; Grahamstown, MacOwan ! 
WESTERN REGION: Namaqualand, ex Lindau, 
_ KAtawart Reaion; Transvaal ; in natives gardens, north of Pretoria, Nelson, 
