Tlysanthes.| | XC, SCROPHULARIACEE (HEMSLEY AND SKAN). 345 
29, ILYSANTHES, Rafin.; Benth. et Hook. f. Gen. Pl. ti. 955. 
: Calyx 5-partite or 5-toothed; segments or teeth narrow, scarcely 
imbricate. Corolla-tube cylindric or somewhat enlarged above ; upper 
lip outside, erect, broad, concave, usually shortly bifid ; lower lip larger, 
spreading ; lobes 3, broad, subequal. Stamens 2, posticous, affixed to 
the corolla-tube, subincluded ; filaments filiform ; anthers subcoherent, 
cells divaricate; staminodes 2, anticous, 2-lobed (one lobe glandular, 
obtuse, the other slender, acute, sometimes minute, sometimes elongated, 
rarely bearing an empty anther) or entire, linear or clavate, obtuse, 
glandular. Style shortly bilamellate at the apex. Ovules numerous 
in each cell. Capsule ovate, oblong to linear, septicidal ; valves slender, 
entire. Seeds numerous, foveolate-rugcse.—Herbs, usually annual, 
slender, creeping or erect, branched, glabrous or more rarely pubescent, 
often growing in marshy places. Leaves opposite, entire or toothed. 
Flowers small, axillary and solitary, or in terminal racemes; peduncles 
or pedicels ebracteolate, often deflexed in fruit.—Bonnaya, Link et 
Otto, Ic. Pl. Sel. 25, t. 11; Benth. et Hook. f. Gen. Pl. ii. 956. 
Species about 35, in nearly all warm countries, chiefly in Africa and Asia. 
I, reptans, Urb., is not African. De Wildeman (Notices Pl. Utiles du Congo, 
549) refers to a plant by this name which is used in the Congo Free State as 
forage for oxen. 
Calyx deeply 5-cleft. 
Terrestrial plants; stems leafy; corolla 2~33 lin. 
long. 
Stems creeping; leaves about as broad as long . 1. J. rotundifolia. 
Stems erect ; leaves longer than broad . 5 . 2 I. parviflora. 
Aquatic plant; stems naked except near the apex; 
corolla about 6 lin. long . : : : . 3. I. conferta. 
Calyx 5-toothed. 
Leaves radical 5 ‘ 3 ~ . - . 4 DT. Welwitschii. 
Leaves cauline. 
Leaves spathulate, ovate or elliptic-oblong. 
Peduncles 3-1 lin. long . c : : . 5. I. nana. 
Peduncles 3-9 lin. long . ‘ ° 6. I, pulchella. 
Leaves linear-lanceolate or linear-oblong. 
Corolla-tube distinctly longer than the calyx; 
calyx-teeth acute or rather narrow at the 
apex. 
Plant only 1-2 in. high; stems simple or 
sparingly branched ; calyx-teeth narrow 
at the apex but not acute ; upper lip of 
corolla emarginate. 
Stems creeping at the base ; leaves 3-6 lin, 
long; calyx 1}-14 lin. long; corolla 
8-4 lin. long . . “ A . VW. L. pusilla. 
Stems erect; leaves 14-2 lin. long; calyx 
scarcely 1 lin. long; corolla about 
24 lin. long : : ~ 
Plant up to 5 in. high; stems much branched ; 
calyx-teeth acute; upper lip of corolla 
bifid, with acute lobes . : - . 9. I. gracilis. 
8. I. ugandensis. 
