470 LVIII. LYTHRACEH (HIERN). [ Rhyacophula. 
3. RHYACOPHILA, Hochst. in Flora 1841, p. 659, 
non Rhuacophila, Bl. 
Calyx campanulate, reddish with 4 wide and shallow rounded mu- 
cronate lobes, without cornua; not accrescent. Petals 4, obovate, rather 
smaller than the calyx-lobes. Stamens 4, arising from near the base 
of the calyx-tube and opposite the calyx-lobes; filaments filiform. 
Ovary free, sessile, 2-celled, included in the calyx, without glands at 
the base; placentas adnate to the dissepiment. Capsule ovoid, sur- 
rounded at the base by the calyx and ultimately eee it, rather 
acute at the apex, dehiscing from apex by 2 (rarely 3) valves sept- 
fragally, containing about 10 seeds.—Aquatic, glabrous except on the 
terete stem and branches, with capillary, fascicled or subverticillate, 
dark green leaves, and terete racemes at the ends of the branches bear- 
ing one bract and two rather smaller bracteoles at the base of each 
flower.— Quartinia, Endl. Gen. Pl. Suppl. ii. 94. A. Rich. in FI. Abyss. 
i, 277, non A. Rich. in Ann. Sc. Nat. sér. 2, xvi. 259. 
A genus of one species, occurring only in Abyssinia. 
1. R. repens, Hochst. l.c. Ascending, often much branched above, 
3-18 in. long. Leaves crowded especially above, erect, $-1} in. long. 
Racemes {—1} in. long ; pedicels ,1,—}/, in. long, erect-patent, alternate, 
opposite or subverticillate, equalling the lanceolate bract, which with 
the bracteoles simulates a calyx. Flowers 3 in. long. Stamens eX- 
serted. Style exserted, persistent. Capsule 74 in. long. Grows 0B 
stones in stagnant water and streams forming reddish purple tufts on 
the surface.— Quartinia turfosa, Rich. Fl. Abyss. i. 277, t. 51. 
Nile Land. Abyssinia, Schimper! 
Flowers and fruits in July. 
4. NESZA, Commers.; Benth. et Hook. f. Gen. Plant. i. 779. 
Calyx campanulate or urceolate, persistent, with 4-8 lobes and as 
many cornua or at least callous points not accrescent. Petals obovate, 
as many as calyx-lobes and corrugated in bud, longer than the calyx 
except in some of the capitate species, coloured, usually caducous. 
Stamens usually twice as many as the calyx-lobes, occasionally the 
same number and in JN. icosandra about three times, usually all or at 
least half of them exserted; filaments filiform. Ovary sessile, ovoid ; 
included in the calyx-tube, 2—5-celled, many-ovuled; style exserted ; 
stigma capitate. Capsule dehiscing by valves or by slits at the apex, 
included in the calyx, membranous ; placenta thick, usually lobed ; see 
numerous.—Herbs or scarcely undershrubs, growing in wet places 
especially by river-banks. Leaves opposite or occasionally alternate oF 
even in J. linifolia and N. lythroides sometimes verticillate. Flowers 
axillary, in stalked cymes or capitate, sometimes dimorphous. Brac- 
teoles on the pedicels, not at the base of the calyx. 
Occurs also in the hot parts of America. 
