Neseea.] LVIII. LYTHRACEER (HIERN). 471 
Flowers cymose. Cornua usually short. 
Leaves auriculate-sagittate, hairy 
Leaves exauriculate, glabrous. 
Cornua shorter than calyx-lobes, glabrous. Stamens 8-21. 
Cornua very small or inconspicuous. 
Leaves never whorled. Stamens 18-21 
Leaves often whorled. Stamens 16-14 
Cornua manifest. 
Peduncles longer than the flowers . . . . . 
Peduncles not (or scarcely) longer than the flowers. 
Flowers tetramerous; pedicels long. . . . 
Flowers usually hexamerous ; pedicels short . 
Cornua long, ciliate. “ Stamens 4 . ees 
Flowers capitate. Cornua long. (Tolypeuma.) 
Bracteoles linear. Heads stalked. 
Leaves not cordate at the base. 
-_ 
. N. lythroides. 
. N. icosandra. 
. NV. linifolia. 
. NV. pedicellata. 
. NV. Candollii. 
2 
3 
4. N. heptamera. 
5 
6 * 
7. N. andongensis. 
Bracteoles glabrous. Bracts usually3 . . . . . : . 8 N.radicans. 
Bracteoles ciliate. Bracts 2. : 
ieaves oval. Branches terete ©. , | ke floribunda. 
Leaves linear-lanceolate. Branches quadrangular . . 10. WN. erecta. 
Leaves cordate at the bate... 2 eee NN cordata. 
Bracteoles wide. Heads sessile. . . etre her ec. 1B NG deel 
1. N. lythroides, Welw. mss. Annual. Rhizome densely fibrous. 
Stems ascending, terete, with stringy cuticle, reddish at the base, 
covered as well as the cymes and branches with pale patent pubescence ; 
lateral shoots frequently barren, 1-4 ft. high. Leaves lanceolate acute 
auriculate-sagittate, those on the barren shoots wider; scabrid espe- 
cially on the margins with white scaly hairs; sessile, alternate oppo- 
Site and in whorls of 3, 4-3 in. long. Internodes shorter than the 
‘eaves except near the base. Cymes in nearly every axil of the tlower- 
Ing shoots, often partially or wholly without developed flowers, few or 
many-flowered. Common peduncles distinct or long, with opposite 
leaf-like bracts at the apex; pedicels equalling the calyx, furnished 
With bracteoles. Flowers rose-coloured, dimorphous according to the 
relative lengths of the stamens and style. Calyx campanulate, nar- 
Towly so in bud, widely in fruit, pubescent, 4-cornered in bud, 4-lobed 
and cornuate; lobes shortly deltoid, pointed; cornua patent, shorter 
than the lobes. Petals exceeding the calyx, widely obovate, veined. 
Stamens 4, opposite the petals, inserted near the base of the calyx, 
exserted especially in short-styled plants; anthers yellow. Ovary 2- 
celled, Sessile; style exserted, especially in short-stamened plants. 
apsule 2-celled, with septa in perpendicular plane to the somewhat 
compressed placenta, slightly exceeding the calyx, parting with its 
‘apex which breaks off attached to the style, valvular below (?). 
Lower Guinea. Angola, Mossamedes, littoral, fl. and fr. Sept., Dr. Welwitsch ! 
Very like Lythrum sagittefolium, Sond. in Linnea xxiii. 41, which occurs -- 8. 
frica; im specimens of the latter plant there are 8 stamens inserted at the same level, 
the 4 longer ones alternating with the petals. 
2. N. icosandra, Kot, et Peyr. in Pl. Tinn, 16, t. V. A. otto 
Stem somewhat woody at base, erect, 3-6 in. high, quadrangular. 
aves oblong or lanceolate, opposite or lower ones often alternate, 
