African and Madagascar Flowering Plants. 367 . 
On Lycium see Muller, p. 426 and No. 590 III ; also No. 
703 ; also L. tubulosum , Ann. of Bot. 1 . c. p. 271. 
Craterostigma naniim. Bth. 
There is a short corolla-tube and a well-marked lower 
lip more than half an inch long. At its highest point, about 
two lines before the entrance to the tube, the lower lip is 
furnished with two yellow solid tubercles about a line high 
and half a line thick. The outer filaments are attached to 
the lower lip near the origin of these tubercles : the filaments 
themselves have a basal horizontal portion and then suddenly 
bend at right angles and converge together just under the 
relatively short upper lip. The inner filaments are short and 
also converge to a point 2 lines below the outer anthers. 
The two pairs of anthers are united severally and are some- 
what hairy. On depressing the lower lip by pushing the 
tubercles gently downwards, the upper pair of anthers is 
brought forwards so as to lie in the line of entrance to the 
corolla-tube. Such a motion of the stamens is as far as I know 
unique in Scrophulariaceae. Subsequently when the anthers 
have finished dehiscing, the stigma elongates and its two lips 
unclose in a position between the two pairs of anthers. 
Visitors : — a Hymenopteron, No. 342. 
Nemesia floribunda, Lehm. 
Visited by Apis mellifica which inserts its head in the 
spur and sucks the honey. In so doing, it must remove the 
pollen from the four anthers arranged above and below the 
stigma. The flower is probably protandrous. 
Nemesia barbata, Bth. (Fig. 102.) 
The calyx and pedicels are covered with stalked glandular 
hairs on which one finds the bodies of unnecessary insects. 
I was not able to satisfy myself whether honey is wholly 
secreted by the base of the ovary in this genus (so as to drop 
into the spur), but I could not make out clearly any secretion 
by the spur itself. 
