112 TITE JOURNAL OF BOTANY 



between the corolla lobes, usually those on the surface facing upward. 

 The petals in freshly opened flowers 1 found to be rather firmly 

 adherent in the outer two-thirds, but in the inner third (i.e. near the 

 point of insertion on the thalamus) they separate rather easily ; soon 

 after maturity there is a tendency to separation on the least pressure. 

 In the young state, if separation cannot be effected, the humble-bee 

 bores through the segments to reach the nectaries, which are situated 

 in the ovary, the secreted nectar streaming down between the honev 

 disc and the stamens, where it collects in droplets. It was quite usual 

 to tind portions of considerable size bitten out of the petal limbs to 

 give free access to the nectar. The body of the honey-bee is shorter, 

 less bulky and less hairy than that of the humble-bee, consequently 

 the former did not appear to be as effective in distributing the pollen ; 

 but the legs and body of the honey-bee in my observation did touch 

 the stigmas and anthers. The flowers are in axillary and terminal 

 cymes and are proterandrous. Every facility was offered for effecting 

 cross pollination. Other insects besides bees visited the flowers; a 

 species of Thrips was a regular visitor and ran round the interior of 

 the corolla-tube, often emerging through the holes bored by the larger 

 insects opposite the nectary or wdiere the petals had been pushed 

 apart These insects may have been auxiliary in producing cross 

 pollination, but are not, I think, as effective* as bees. The plant 

 produced numerous seeds, which escaped by decay of the soft tissues 

 between the vascular bundles of the calyx-tube. 



I can find no reference to pollination in Escallonia in the Handbook 

 of Flower Pollination by Knuth or in Kerner's Natural Histon/ of 

 Plants. — H. A. Cummins, University College, Cork. 



H. W. Lett. An examination of Moyle liogers's herbarium and 

 MSS. gives evidence of the great debt which he owed to Lett (and 

 Wadded too) for his knowledge of the Rubioi N.E. Ireland. Bubus 

 Lett// is a name which records this fact; and botanists who are 

 chiefly interested in phanerogams will easily recall other genera where 

 Lett's researches and specimens produced important additions to our 

 knowledge. — H. J. RrDDELSDELL. 



KEVIEWS. 



The Bahama Flora. By Nathaniel Lord Brixton, Ph.D., Sc.D., 

 LL.D., Director-in-Chief of the New York Botanical Garden^ 

 Professor in Columbia University, and Charles Frederick 

 Millspauoh, M.D., Curator of Botany, Field .Museum of 

 Natural History, New York ; published by the Authors, June 2(5, 

 1920, C K. Ackerman, Lorillard Mansion, Bronx Park, New 

 York City. Svo, cloth, pp. viii, 695. Price $0.25, post free. 



In this volume we have one more evidence of the energy with 

 which systematic botany is being pursued in the States, and of the 

 care which is bestowed upon the floras of outlying regions. Two 

 years ago, Dr. Britton published his Flora of Bermuda (noticed in 

 this Journal for February 1919, p. 14), and now we have from him— 



