riatostoma] xcvir. labiat.e. 855 



2. P. flaccidum Hook. f. Fl. Jirit. Iii.l. iv. p. r,ll (Aug. 1855) ; 

 Bri(i. in Engl. Bot. Jahrb. xix. p. 1G5 (18!)t) (/'/ati/sloma). 



Ocivmiti Jlnccidnm A. Rich. Fl. Abys.s. ii. p. 179 (IS51). /'. sp., 

 Benth. ct Hook, f., I.e., p. 1173. /'. Schimperi Jlochst. in Pi. 

 Schiuip. Abyss., ed. 2. Hohenacker, n. 2045 (1852). 



GoLUNOO Ai/ro. — A prostrate-ascending herb, with reddish flowers. 

 In a cultivated place on the right bank of the river Cuango, in the 

 arimo of Senhor Mariano among pot-herbs, seen only in one spot ; 

 H. and fr. Dec. 1854. No. 5536. A tender and insignificant annual 

 hcrblet, erect or ascending, germinating flowering and fruiting within 

 the space of H) to 1.') days; stem angular ; calyx bilabiate, helmet- 

 shaped after flowering, closed with the up[)er lip entire and the ([uite 

 entire lower lip more closely incumbent ; corolla pale violet in colour, 

 more deeply violet on the lobes of the upper lip. In damp cultivated 

 places in i)lantations of Phaseolns at the banks of the river Cuango, 

 in company with Cuvdani/iie irirJincdrjia Ilochst. (Wolw. hcrl). no. 11 89) ; 

 11. and fr. Sept. 1854 and Nov. 1S55. No. 5535. An annual, rooting 

 herb, ascending or rather rarely somewhat erect ; flowers very small, 

 whitish, very caducous. By streams in the primitive forest of Quisu- 

 culo, in company with Begonia oxi/loba Welw. herb. no. 875 ; fr. and 

 very few fl. April 1S5G. No. 5534. 



Hooker, I.e., considered this species as probably only a state of 

 P. africununi P. Beauv. 



5. ACROCEPHALUS Benth.; Benth. cl- Hook. f. Gen. PI. ii. 

 p. 1173. 



1. A. gracilis Bricp in Engl. Bot. JahH). xix. p. 166 (1894). 

 PuN(;o AxDoNcjo. — A perennial herb, 1^ to 2 ft. high; stems in 



some instances erect, in others ascending ; flowers violet in colour. In 

 thickets on a sandy clay soil, near Luxillo ; fl. beginning of May 1857. 

 No. 5548. 



HuiLL.\. — A strictly erect annual herb or undershrub, 1 to lA ft. 

 high ; stem quadrangular, branched ; leaves linear-lanceolate, some- 

 what rigid, bright green, arching-patent or reflected ; flowers blue or 

 white-violet in colour, S2)icate-capitate ; the heads very densely brac- 

 teate, shaggy, pale violet in colour. In bushy pastures on the Humpata 

 plateau, fl. April 18(J0 ; in very elevated sandy sparingly bushy pastures 

 m Morro de Lopollo, plentiful, fl. April and May 1860 ; also in 

 very elevated sparingly herbaceous places in Morro de Lopollo, near 

 Empalauca, fl. beginning of May ISlJO. No. 5515. 



2. A. praealtus Briq., I.e., p. 168. 



An erect herb, perennial, 3 to 4 ft. high, branched ; branchlets 

 trichotomous, erect -spreading, tetragonal ; flowers capitate-.spicate, 

 densely bracteate, whitish with a violet tinge ; bracts whitish ; 

 calyx urceolate-tubular, truncate or shortly bilobed, densely 

 shaggy-bearded at the mouth, naked inside ; corolla pale violet 

 in colour, bilabiate ; the tube exserted, nearly straight ; the 

 upper lip erect, emarginate at the apex, the lower lip trilobed, 

 the middle lobe broader than the others ; stamens 4, didynamous, 

 exserted ; filaments shaggy at the base ; anthers versatile, the 

 cells confluent, thickly patelliform ; style filiform, undivided ; 

 stigma somewhat acute ; young nutlets smooth. 



HuiLLA.— In the forest among tall herbs, at the lake of Ivantfda ; 



