Buchnera.| XC11. SCROPHULARIACEH (HEMSLEY AND SKAN). 3938 
3-I lin, long, acute. Corolla bright scarlet or orange-red; tube about 
» lin, long, very narrow, cylindric, curved near the top, ribbed, nearly 
glabrous outside, pilose inside chiefly at the throat; lobes obovate or 
the upper obovate-rhomboid, 3—5 lin. long, 14-34 lin. broad, slightly 
and irregularly toothed, very sparingly ciliate below. Anthers acute. 
Style 1 lin. long. Capsule oblong, about 3 lin. long. 
Mozamb Dist. German East Africa: Uhehe; near Tengulingi, Goetze, 
697! Lower plateau, north of Lake Nyasa, Thomson ! 
This plant yields a green colouring matter when macerated in water. 
41. B. Baumii, Lngl. & Gilg in Baum, Kunene-Samb, Exped. 367. 
An erect annual herb 1-1} ft. high, sparingly and minutely pubescent 
(often bifariously on the stem and branches); stem terete, sparingly 
branched, and with very short leafy branches in the axils of the leaves ; 
longer branches erect-spreading. Lower leaves rosulate, obovate, 
lanceolate or oblanceolate, 3-1} in. long, 3-4} lin. broad, obtuse, 
cuneate at the base, minutely and sparingly pubescent and ciliate, 
thickened scabrid and revolute on the margins; upper leaves linear, 
mostly narrowly linear or filiform, 3-1} in. long, }—# lin, broad, obtuse, 
minutely pubescent, somewhat scabrid. Spikes terminal], dense at the 
apex, often interrupted below and elongating after flowering; bracts 
ovate to ovate-lanceolate, 1-1} lin. long, 4-3 lin. broad, acute or 
acuminate, sparingly and shortly ciliate, nearly glabrous on the back, 
somewhat keeled ; bracteoles linear-lanceolate, 3~4 lin.long. Calyx 2}~3}4 
lin. long, shortly and sparingly pilose, 10-nerved; teeth narrowly 
deltoid to subulate, 4—? lin, long, the uppermost tooth minute. Corolla 
bluish ; tube 4-4} lin. long, very narrow, cylindric, straight, pilose 
outside, densely pilose at the throat inside; lobes obovate, 17-2} lin. 
long, 1-1} lin. broad. Anthers acuminate. Style # lin. long. 
Lower Guinea. Angola: Amboella; between Kassinga and the River Ku- 
bango, 4600 ft., Baum, 225! 
42. B. humpatensis, Hiern in Cat. Afr. Pl. Welw. i, 777. A 
slender erect branched annual herb 9~12 in. high, glabrous except some 
small callous scales chiefly on the leaves; stem angular, usually bright 
purple-red; branches opposite or the upper alternate, ascending. 
Leaves opposite or the upper alternate, lanceolate or linear-lanceolate, 
up to 1} in, long and } in. broad, acute, slightly narrowed at the base, 
I-nerved, sprinkled over and bordered with callous points. Flowers 
Subsessile, usually opposite (the pairs about 4 in. apart), in terminal 
spikes 2-6 in. long; bracts broadly ovate or ovate-elliptic, 14-8 lin. 
long, concave, minutely 2- or 3-toothed at the apex, glabrous or nearly 
80; bracteoles 0. Calyx 1}-2 lin. long, slightly puberulous ; tube 
campanulate-oblong ; teeth about } lin. long, ovate, acute. Corolla- 
tube nearly cylindric, scarcely curved, green, 1} lin. long, glabrous; 
lobes 5, somewhat unequal, narrowly obovate, about $ lin. a 
Anthers obtuse. Style scarcely more than } lin. long. Capsule 1{-2 
lin. long, ellipsoid, bisulcate, slightly emarginate. 
Lower Guinea. Angola: Huilla; in the damp pastures of Humpata and 
Nene, Welwitsch, 5798 ! 
