Tristemma| LIV. MELASTOMACEA, 365 
pluri-setose at the apex, girt at the throat with a short furfurfaceous 
ring, adhering only to the base of the ovary ; tube inside naked, glossy, 
polished ; petals 5 or 6 (on the same plant), inserted on the throat of 
the calyx, broadly ovate, truncate at the base, rosy, rather fleshy, very 
readily deciduous, scarcely } in. long, beset on one side with glandular- 
ciliate hairs ; stamens 10 or 12 (even in the same flower-head 6 petals 
and 10 stamens were noticed), inserted with the petals, ascending in a 
curved manner ; anthers of two forms, each opening by one pore, 
alternate larger, rosy, not yellow as the others, all arched ; ovary 
superior, not half inferior, altogether embraced by the calyx, concave, 
truncate at the top, 5-setulose at the apex, 5-celled, with several ovules 
in each cell ; capsule baccate, beautifully purple, urceolate, crowned 
with the 5 reflected lobes of the persistent calyx, beset with a double 
row of hairs, soft when ripe ; seeds very numerous, imbedded in pulp. 
In moist very shaded woods and rugged situations at the sides of 
streams amongst the mountains of Serra de Alto Queta, sporadic (as 
are most of the species of this family seen by Welwitsch in Angola) ; 
fl. 7 Jan. 1855, fr. end of May 1855 ; Mata do Mangue, fl. April 1856. 
No. 900. 
2. T. albiflorum Benth. in Hook. Niger Fl. p. 353 (1849); 
Cogniaux in DC. Monogr. Phan. vii. p. 362 (1891). 
Melastoma albiflorum G. Don, Gen, Syst. ii. p. 764 (1832). 7. 
Schumachert, var. albiflorwm Hook. f. in Oliv. Fl. Trop. Afr. ii. 
p. 446. 
IsLanp or St. THomas.—On the more elevated rocky wooded parts 
of Fazenda de Monte Caffé, very sparingly ; not yet flowering, Dec. 
1860. No. 922. 
This determination is very doubtful. 
3. T. littorale Benth. in Hook. Niger Fl. p. 353 (1849) ; 
Cogniaux in DC. Monogr. Phan. vii. p. 362 (1891). 
T. Schumacheri, var. littorale Hook. f. in Oliv. Fl. Trop. Afr. ii. 
p. 446. 
Punco AnponGo.—A shrub, 6 ft. high, with sparse and rambling 
branches ; stem simple at the base, as thick asa man’s finger, purplish ; 
flowers large, rose-purple. By swamps and in the waters of the river 
Quanza at the island of Calemba ; the stem almost floating ; fr. and 
few fi. 12 March, 1857. No. 906. 
3. DISSOTIS Benth. ; Benth. & Hook. f. Gen. Pl. i. p. 746. 
1. D. capitata Hook. f. in Oliv. Fl, Trop. Afr. ii. p. 449; 
Cogniaux in DC. Monogr. Phan. vii. p. 365 (1891). 
Heterotis capitate Benth. in Hook. Niger Fl. p. 352 (1849). 
Tristemma capitatum Triana in Trans, Linn. Soc. xxviii. p. 56, 
t. iv. £. 41d. (1871). 
Var. Barteri Cogn., /.c. 
Punco ANDoNGO.—An erect, shaggy undershrub, 23 to 3 ft. high. 
In rocky thickets near streams in Serra de Pedras de Guinga; fr. 
March 1857. No. 903. An erect herb, 2 to 3 feet high ; rootstock 
spongy ; stems numerous ; flowers pretty, purple. In damp thickets 
between Quitage and Bumba; fr. and few fl. March 1857. This de- 
termination is doubtful. No. 9030. 
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