SOME AFRICAN LABIATE WITH ALTERNATE LEAVES. 273 
Of Eolanthus zanzibaricus we have seen specimens collected 
by Hildebrandt (Kingani river, 1265), Johnston (Kilimanjaro 
Exped.) and Holst (Usambara, 2957). All have the leaves 
opposed, but in the inflorescence lose this character. At the base 
of the spike terminating the axis a pair of lateral spikes spring 
from opposite sides of the stem ; sometimes these again branch, 
but more often they are simple. Examining the terminal spike 
first, we see that the lowest flowers are sometimes opposed, but 
more often alternate ; at about the middle the decussation of 
paired flowers is regular, but apt to become irregular again near 
the apex. On the lateral axes we see invariably a solitary flower 
at the first internode, which is situated immediately above the 
braet in the axil of which the axis arose; next, to right and Jet, 
a pair of flowers: then one over the first flower; then a pair; 
and so on. The sterile face of the axis is that directed towards 
the parent axis. 
In A. Cameronii * we find a similar arrangement, but all the 
lateral axes which we have seen possess a sterile face which 1s 
turned towards the parent axis. Fig. 1 of the woodcut shows a 
portion of an axis bearing six flowers; at the very base are two 
brauches; then a solitary flower; next a pair of flowers; then 
* /Eonawruus Cameron, Burkill. Caules erecti vel suberecti, pilis per- 
parvis puberuli, obscure angulati, internodiis longis. Folia ovata, apice 
acutiuscula, basi obtusa, margine irregulariter serrata, utrinque minutissime 
puberula, 10-14 lin. longa, 4-6 lin. lata; petiolus 6-8 lim. longus. Spice 
candelabri modo compositx ; spica (terminalis ?) 15-16 lin, longa; spice late- 
rales 8-10 lin. longæ, inferiores ad apices peduneulorum longorum semel et 
iterum trifurcatz ; bracte 3-1 lin. longi, cito decidux, subulate vel inferiores 
lanceolate, flores dorsiventraliter in foveolis axi, nodis nune singuli nune bini 
alternatim dispositi. Calyx bidentatus, pubescens, florens vix 1 lin. longus. 
Corolle tubus 1 lin. longus nee ampliatus ; labium superius rotundatum, margine 
leviter 4-lobatum, 1 lin. longuin ; labium inferius superiori paululo longius. 
Staminum filamenta 3 lin. longa. ` Ovarii nucule ovoider. 
Hab. British Central Africa: Shiri Highlands, Namasi, K. J. Cameron, 18. 
It is probable that we only possess lateral branches of this plant, in which 
case the terminal intlorescence of the main axis may differ in detail. A. Can- 
delabrum, Briquet in Engl. Jahrb. xix. 186, seems to resemble it in habit, but 
differs much in the flower, The extreme delicacy of the calyx at the time 
of flowering is very noticeable; and under the microscope a series of large 
stomata are seen on the terminations of conspicuous anastomosing veins, 
apparently hydathodes. 
