Oxygonum] civ. POLYGONACEiE. 903 



a double tetragonal pyramid, each pyramid being placed base to base 

 with reference to the other. In the poorer plots of cultivation and on 

 rubbish heaps, very plentiful, extending from Ambaca to the praesidium ; 

 fl. and fr. Nov. and Dec. 1856. No. 1756. An annual, procumbent- 

 ascending herb, with white flowers and blue anthers. In cultivated 

 places and by roadsides ; fr. Feb. 1857. Coll. Cakp. 864. 



3. 0. sinuatum Dammer, Ic. 



Ceratogonon sinuatum Hochst. & Steud. in Schimp. PI. Abyss. 

 Exsicc. i. n. 264 {U.i., 1840); Britten, I.e., partly. 



HuiLLA. — An annual, glaucescent herb, with white flowers. In 

 pastures among low bushes, flooded in the rainy season, near LopoUo, 

 rather rare : fl. and young fr. Jan. 1860. No. 1758. 



Perhaps only a form of the previous species. 



4. 0. Acetosella Welw. in Trans. Linn. Soc. xxvii. p. 60 (1869) ; 

 Fioallio, PI. Uteis, p. 244 (1884). 



MossAMEDBS. — An annual, glabrous, somewhat fleshy, quite glaucous, 

 decumbent or prostrate herb, branched from the base ; stem semi- 

 cylindrical, the raohis of the flowering racemes acutely triquetrous ; 

 ochrese truncate, quite entire or minutely erose-denticnlate ; leaves 

 broadly lanceolate or ovate-lanceolate, gradually narrowed into the 

 winged petiole, repand-toothed or sinuate-dentate on the margin, 

 rather fleshy, very agreeably acidulous, when cooked rivalling those 

 of Rumex Acetosella L. and providing a complete substitute for them ; 

 perianth deeply 5-cleft, ooroUine-whitish ; the segments obovate or 

 broadly elliptical, obtuse, apioulate, somewhat concave, patent, the 

 two outer ones with a green keel, stamens 8 ; filaments subulate ; 

 anthers didymous, versatile, pale blue ; style deeply trifld, white ; 

 stigmas capitate, yellow ; achene included in the tube of the perianth 

 and adhering to it, elongate-ovate, obsoletely and bluntly trigonous 

 when not quite ripe ; bracts 3- to 5-flowered ; racemes often li ft. 

 long. In sandy maritime hilly places from Mossamedes towards Gabo 

 Negro, especially near Praia da Amelia, plentiful ; fl. and young 

 fr. June and July 1859. Called " Azedas bravas " (wUd sorrel). 

 No. 1757. 



2. POLYGONUM Tournef ., L.; Benth. &, Hook, f . Gen. PI. iii. p. 97. 



1. P. hemiarioides DelUe, PI. ^gypt. lUustr. p. 61 (1812). 

 Mossamedes. — An annual, prostrate herb, with the habit of P. 



aviculare L., and whitish-rosy flowers. In moist sandy places at the 

 river Bero ; fl. July 1859. No. 5372. 



HniLLA. — In poor pastures flooded in summer, near Ohai ; fl. and 

 fr. April I860. No. 5373. 



2. P. scabrum Poir. in Lam. Enoycl. M6th. vi. p. 148 (1804). 

 P. salicifoUvm Broussonet ex WiUd. Enum. Hort. Berol. p. 428 



(1809). P. serrulatum Lagasca, Gen. at Sp. PI. p. 14. n. 181 

 (1816). Persicaria serridata Webb & Moq, in Webb & Berth. 

 Phyt. Canar. iii. p. 219 (1842-43 ?) ; J. A. Schmidt, Beitr. Fl. 

 Cap Verd. Ins. p. 177 (1852). 



G-OLUNGO Alto. — At the banks of the river Muria near Ponte de 

 Muria ; fl. and fr. Sept. and Oct. 1854. No. 5367. 



Mossamedes. — A perennial herb, 3 to 5 ft. high; stem rooting, 

 ascending, quasi-scandent among Scirpoidese (of. Scirpus maritimus 



