322 MR. SPENCER MOORE ON THE 
CALOSTEPHANE DIVARICATA, Benth., in Hook. Ic. Pl. sub 
tab. 1111. 
Rhodesia, Deka Siding (on railway between Bulawayo and 
Victoria Falls); F. Eyles, 82. 
GxraERIA BurKer, Harv. Fl. Cap. iii. 126. 
Swaziland, mountains above Em Babaan ; J. B. Davy, 2824. 
BIDENS AMBIGUUS, sp. nov. Herbaceus, bispithameus, glaber, 
caule simplici gracili ascendente sparsim folioso, foliis sessilibus 
anguste linearibus obtusis integris vel raro breviter paucilobatis, 
lobis linearibus obtusis, capitulis mediocribus terminalibus soli- 
tariis longipeduneulatis, involucri subhemispherici phyllis ex- 
terioribus herbaceis interioribus subzquilongis lineari-lanceolatis 
obtusis extus puberulis phyllis interioribus ovato-oblongis obtusis 
membranaceis pluristriolatis sursum ciliolatis, receptaeuli paleis 
ovatis obtusis, ligulis cirea 8 ex involuero bene eminentibus luteis, 
achæniis nondum maturis late oblongis nequaquam alatis glabris 
velfere glabris aristis 2 quam se ipsa brevioribus dentibus perpaucis 
nune erectis nune recurvis onustis vel etiam omnino calvis. 
Hab. Angola, in open forests on the left bank of the river 
Quauze at Kiambella ; Gossweiler, 1189. 
Caulis obtuse quadrangularis, 0°15 em. diam. Folia modica 
2:5-8:5 em. long., 01-0715 em. lat.; lobi dum adsint 03-04 em. 
long. Pedunculi 10:0-18:0 em. long., nudi vel bractea unica 
lineari circa 1:0 em. long. preediti. Capitula pansa 0°8 em. long., 
2:5 em. diam.  Involueri phylla exteriora 0:6-6/7 cm. long., 
summum 0°13 cm. lat.; phylla interiora 0°75 cm. long., 0'2- 
0:25 cm. lat. Receptaculi pales 0-6 em. long. Ligule 1'0 cm. 
long., ovato-oblonge, margine crispule, apice 2-fide, 11-12- 
nervose. Disci corolle 0'5 cm. long. Anthere basi integre. 
Styli rami appendice abbreviata coronati. Achenia 0'3 cm., 
pappi ariste 0:2 em. long. 
Nearest B. lineariloba, Oliver & Hiern, but a weaker growing 
plant than that, with leaves entire or almost so, and different 
involueres and achenes. "These latter organs are peculiar, and 
in this respect the plant may be regarded either as a Bidens or 
a Coreopsis ; hence the trivial name selected for it. 
B. croceus, Welw., ex O. Hoffm., in Bol. Soc. Brot. x. (1892) 
177, var. VERRUCIFERUS, var. nov.; achæniis crebro spinuloso- 
verrucatis infra apicem vero glabris. 
Angola, Catombe near Malange; Gossweiler, 1210. 
