272 MESSRS. I. H. BURKILL AND C. H. WRIGHT ON 
of two or one branch (or flower) at each node. But it must be 
remarked that there is a tendency to anisophylly, the larger leaf 
(bract) being that without any flower. The difference in 8120, 
which is but little, is shown in the figure. It is in no way 
so obvious as in another member of the Labiate— Pogostemon 
paniculatum *, 
The position of the flowers is interesting, for, as shown in the 
diagram (fig. 6), they oceupy only two faces of the obscurely 
1. Portion of the inflorescence of Æolanthus Cameronii, showing the bases of 
the calyces of six flowers. 2 & 3. The axis in section, in two consecutive 
internodes. 4. Diagram of position of flowers. 5. Portion of inflorescence 
of Æolanthus virgatus, showing anisophylly and alternate flowers. 6, Dia- 
gram of position of flowers, 7. Portion of inflorescence of Æolanthus sp., 
showing flowers and bracts. 5 and 7 slightly reduced. 
quadrangular stem ; neither of these faces in the case of lateral 
axes is turned towards the parent axis. 
The arrangement of the flowers in two rows is common in 
Eolanthus. Another form in which the bracts are approximated 
is shown in fig. 7, taken from an undescribed species. In 
several others of the genus the bracts alternate, as do the 
flowers. 
Interesting forms connecting these with a more normal arrange- 
ment are seen in A. Cameronii, described below, and A. zanzi- 
baricus, S. Moore. We shall take first the last-named. 
* Cf. also Briquet, ‘Monographie du genre Galeopsis’ (Paris, 1893), p. 35, in 
which genus a tendency in the same direction occurs. 
