0'erma7iea] xcvii. lahiat.e. 861 



1. G. cylindracea. 



rifctriDithus ojlindracens Ilochst. iii PI. Sehimj). Al)vs.s. ii. 

 n. lli;5 (r./., isi2) ; Benth. in DC. rrutlr. xii. p. GU (LS4S) ; A. 

 Kifli. Fl. Abyss, ii. p. ISli (18D1). (ieniosporniii lasiost<JicUyum 

 Briq. in Engh Bot. Jalii-b. xix. p. IG-t (1894). 



Huii.L.v. — A lieshy shrub or robust herb, the whole plant especially 

 the leaves very agreeably aromatic ; the aroma like those of marjoram 

 and mint mixed ; stems numerous, some 5 to ('» ft. liigli witii sarmentose 

 subscandent branches ; others short, with decumbent branches ; leaves 

 very brittle, somewhat fleshy and rigid ; flowers white, small, bilabiate. 

 In rocky, wooded places in Morro de LopoUo, plentiful ; 11. April I8G11. 

 No. 5489. 



2. G. herbacea. 



Plectra iithns herlmcens Briq., I.e., p. 179. 



Hrn.i..\.— An annual, erect, branched herb, .smelling like mint ; stem 

 acutely quadrangular ; leaves ovate, somewhat fleshy, soft, coarsely 

 crenate-dentate, beneath mostly purplish and with raised nerves and 

 net-veins, punctate ; flowers white ; upper calyx-lobe broadly ovate, 

 the limb at length reflected ; corolla comparatively small, the tube 

 sigmoid, the upper lip 4-lobed, and marked with a few purple lines, 

 the lower lip boat-shaped ; anthers 1-celled ; style simple ; stigma 

 somewhat bdol)ed, papillose. In damp forests at Catumba in the 

 Lopollo country, rather rare; fl. and fr. 29 INIarch iSilO. No. 5506. 

 An undershrub with quadrangular stem and purple flowers. In 

 the Monino wooded thickets, rare ; fl. and fr. April IXiJQ. Only one 

 mutilated specimen, probably of this species. No. 5614. 



3. G. laxiflora. 



Plectranthns laxijloriis Benth. in E. Mey. Comm. PI. Au.str. 

 Afr. p. 228 (1837). 



Var. genuina (Briq., I.e., \>. 180). 



PrN(;(i AxDoMJO. — An erect branched perennial herb, 2 to 4 ft. 

 high ; aroma precisely like that of Elemi-Mubafo (cf. Canarium edule 

 Hook. f.,(intp p. 127) but sweeter and more penetrating ; stem obtusely 

 quadrangular, a little swelled below the nodes, at length constricted at 

 the nodes, beset on all sides as well as the leaves Avith long glandless 

 hairs and also with shorter glandular ones ; corolla pale clear blue, the 

 upper lateral lobes of the lip involute : anthers blackish purple : style 

 bifid at the apex. At the rocky banks of the river Casalalt', in the 

 pra3sidium ; fl. end of Feb. 1857. Leaves succulent-membranous, 

 bright green, fragrant when rubbed. In moist thickets at the Songue 

 rocks; without fl. middle of Jan. 18.')7. No. 5545. In the rocky 

 thickets of the pnusidium ; fl. and fr. April 1857. Coll. C.vri'. 855. 



4. G. concinna Uiern, sp. n. 



An iinnnal, erect, slender herb, 9 to 24 in. high ; stem a little 

 branched, puberulous below, usually hirsute above with spreading 

 long hairs mixed with short ones and minute glands ; leaves 

 opposite, deltoid-ovate, obtuse or scarcely acute at the apex, sub- 

 truncate or somewhat cordate near the shortly narrowed base, 

 membranous, minutely punctate, thinly haiiy above, more densely 

 so and paler beneath, crenate, 1 to 3 in. long by 'i to 2 J in. broad ; 

 petioles ranging up to 2 in. long, more or less shortly hairy and 

 also hirsute with long spreading hairs ; the leaves at the base of 



