Ammannia. | LVIII. LYTHRACEZ (HIERN). 479 
wards base, sessile, not auricled, 1-veined, subscabrous, opposite (at 
ends of branches subopposite), $-2 in. long by y4—4 in. wide. Upper 
internodes about a quarter the length of the leaves. Flowers in dense 
axillary clusters, about 6 in each axil, with small linear or lanceolate 
scarcely glabrous bracts. Calyx usually covered with numerous small 
squarrose scales, urceolate, with 4 or rarely 5 ovate-deltoid mucronate 
lobes at apex. Petals wanting. Stamens as many as the lobes of the 
calyx ; filaments arising from about middle of the tube, short, included. 
Style short. Capsule 1-celled, enclosed in the tube of the calyx which 
is constricted above it. 
Nile Land. Kordofan, Kotschy! 
6. A. diffusa, Willd. En. Pl. Hort. Berol. 167. Stem prostrate, 
terete, rooting at the base, flexuous, branched, about a foot high. 
Leaves lanceolate, rather blunt at apex, narrowed at the very base, 
scarcely auricled, about }in. long. Internodes 3-3 in. long. Flowers 
and fruit small. Bracteoles minute. Flowers when young crowded, 
few together on slender filiform pedicels and scarcely any peduncle. 
Calyx 8-veined. Petals 4, of a violet colour, exceeding the calyx or 
wanting. Stamens 4 or 8, equalling or exceeding the calyx, when 
only 4 opposite the calyx-lobes. Ovary 2-celled; style rather short.— 
A. gracilis, Guill. et Perr. Fl. Seneg. 301. 
Upper Guinea. Senegal, fl. April, Perrottet ! 
7. A. crassicaulis, Guill. et Perr. Fl. Seneg. 303. Stem sponsy, 
erect or ascending, rooting near base, about a foot long. Leaves 0 
ovate-oblong, subsessile, attenuate at base, }-1? in. long, }—? in. wide. 
Cymes 1—7-flowered ; common peduncle short in flower, lengthened 
in fruit ; pedicels slender, long. Calyx with 4 shallow rounded emar- 
ginate lobes, enlarged in fruit. Petals caducous. Stamens 4 (or 8 
according to Guill. et Perr.), arising from bottom of calyx-tube, as long 
as the calyx or rather longer. Ovary 4-celled at base, 2-celled above ; 
style short. Capsule large with thin purplish pericarp; placenta com- 
pressed. 
Upper Guinea. Senegal, Perrottet! (flowers from March to May.) 
North Central? Z. Vogel! 
8. A. sarcophylla, Welw. mss. Annual, rather fleshy, branched 
from the base, with rather thick stem and branches, here and there 
rooting at the nodes and prostrate ; branches tetragonal, sometimes a 
foot long. Leaves rather rigid, glaucescent, varying from ovate-lan- 
ceolate with a cordate-auriculate base to auriculate-rotund, blunt, nearly 
an inch long, spreading ; margins somewhat thickened, recurved, sub- 
lepidote. Flowers in dense subsessile axillary clusters, those on oppo- 
Site sides of the branch confluent. Bracteoles lanceolate, minutely ciliate 
°n Margins, unequal, some as long as the flower. Calyx campanulate, 
with 4 deltoid lobes and 4 longer cornua; cornua papillose or ciliate at 
*pex. Petals wanting. Stamens 4, equalling the calyx. Style very 
