386 CLI. LABIATH (BAKER). [ Pycnostachys. 
29. P. orthodonta, Giirke in Engl. Pfl. Ost-Afr. C. 345, Stem 
tetragonous, glabrous. Leaves with a very long petiole, ovate-lanceolate, 
conspicuously acuminate, narrowed to the base, deeply crenate, mem- 
branous, quite glabrous on both surfaces. Spikes very long. Calyx- 
tube campanulate; teeth longer than the tube, straight, not reflexed. 
Mozamb. Dist. Portuguese East Africa: Grorongoza ; near Gouveia, Carvalho. 
30. P. pubescens, Giirke in Engl. Pf. Ost-Afr. C. 349. Stem 
branched, tetragonous, pubescent. Leaves with a long petiole, ovate- 
lanceolate, 3—4 in. long, acuminate, narrowed to the base, inciso-crenate, 
pubescent on both sides, more densely beneath. Spike elliptical ; flowers 
sessile. Calyx globose, pubescent ; teeth 14—2 times the length of the 
tube, pubescent upwards. 
Mozamb. Dist. Portuguese East Africa: Gorongoza district, Carvalho. 
British Central Africa : Nyasaland, Buchanan, 
31. P. leptophylla, Baker in Kew Bulletin, 1898, 161. Stems 
long, erect, branched, square, obscurely pubescent. Leaves distinctly 
petioled, ovate, acute, membranous, scabrous, the lower ? in. long; 
base entire, broadly cuneate. Spikes dense, 1—2 in. long. Caly x-tube 
campanulate, } in. long; teeth subulate, scabrous, half as long agai as 
the tube. Corolla blue, } in. long; lower lip concave, unguiculate, 
4 in. long ; upper lip small. Stamens not exserted. 
Mozamb. Dist. British Central Africa: Nyasaland ; Kondowe to Karonga, 
2000-6000 ft., Whyte! and without precise locality, Buchanan, 873! 
32. P. Batesii, Baker. An undershrub 8 ft. high, with slender 
quadrangular branches. Leaves long-petioled, cordate-ovate, 2—3 1D. 
long, acute, crenate, membranous, green and glabrous on both surfaces. 
Spike terminal, very dense, 1 in. long. Calyx-tube campanulate, hairy; 
teeth lanceolate-subulate, rigid, erecto-patent, 4 in. long. Corolla 
purple ; lower lip oblong-navicular, } in. long. Stamens included. 
Upper Guinea. Cameroons: Efulen, in wet places, Bates, 372! 
33. P. cyanea, (iirke in Engl. Pfl. Ost-Afr. C. 349. Stem 
branched, tetragonous, glabrous. Leaves with a long petiole, ovate, 
very acuminate, narrowed to the base, irregularly and deeply crenate, 
membranous, glabrous except on the ribs and margins. Spikes many- 
flowered. Calyx pubescent; tube campanulate, 10-nerved; teeth 
obliquely erect or slightly reflexed. Corolla blue. 
Mozamb. Dist. German East Africa : Usagara; Tubugwe, Stuhlmann, 213. 
British Central Africa: Nyasaland, Buchanan. 
34. P. urticifolia, Movk. in Bot. Mag. t. 5365. A much-branched 
perennial herb, 5—7 ft. high, with pubescent branchlets. Leaves long- 
petioled, ovate, acute, deeply inciso-crenate, densely pubescent, the 
lower 3-4 in. long. Spikes very dense, finally 2-3 in. long, 1z iD. 
diam. exclusive of the corollas. Calyx finally } in. long; teeth very 
rigid, three times as long as the tube. Corolla bright blue; lower lip 
