98 GEOEGB LAWSON 



Victoria regia was shown. These drawings were prepared by Dr. Lawsoii, from observa- 

 tions made partly on the Royal Water Lily that was so successfully grown in an opeu 

 air pond, in Knight and Perry's Nursery, King's Eoad, Chelsea, in the autumn of 1851, 

 and partly on material obtained from a plant that llowered in the Botanic G-arden of 

 Glasgow, in 1855, and of which an account was given in Section D of the British Asso- 

 ciation at the meeting h«ld that year in G-lasgow. These drawings showed the epider- 

 mis and stomata, with their chlorophyll granules, of the upper surface of the leaf ; the 

 surface-cells, hairs, and what were regarded as the basal cells of aborted hairs, of the 

 under surface ; the prickles in several aspects and sections, exhibiting their cellular 

 structure, the ostiole, etc. ; the intercellular air-spaces of the leaves, and the large, 

 stcllately branched iirocesses projecting into them, with bead-like markings on their 

 surface ; colouring matter of the under surface leaf-i'clls, the depth of colour markedly 

 difïerent in contiguous cells ; the so-called stomatodes or perforations of the leaf, 

 margined by more or less oblong, flat-sided cells, hlled exclusively with red or rosy 

 colouring matter ; the upper surface petal-cells, with thick, translucent, slightly plicate 

 or crimped cell-walls, and filled with colouring matter of a rose-colour of diverse depths 

 of shade in diiFerent parts of the petal. 



Part II. 



Nomenclature of Nymph.^ACE^. 



In the Bulletin of the Torrey Botanical Club, of New York, for September, 188*7 (XIV, 

 p. ItT), Prof. Edward L. Greene, of the California University, called attention to the 

 circumstances attending the separation from the old genus Nymphœa of the yellow- 

 flowered Water Lilies, or " Pond Lilies," as they are usually called in Canada, into a, 

 distict genus, the Ntiphar of Smith, who published it in Sibthorp's "Flora Grœca" in 

 1806. Prof. Greene pointed out, what he supposed was unknown to English botanists 

 that Salisbury's work in separating the white from the yellow-flowered Water Lilies was 

 published prior to the appearing of Smith's generic name Nuphar for these plants, for the 

 plate in " Paradisus Londinensis " bearing the figure and the name of Salisbury's Caslalia 

 magnifica was issued in October, 1805. He accordingly urged the restoration of Salis- 

 bury's generic names : Nymphœa for the yellow-flowered or nuphar species {=Nuj)har, 

 Sm.), and Caslalia {=Leuconymphœa, Bœrrhave, pre-Linnsean) for the more showy kinds 

 with red, white, or blue flowers. 



In the Torrey Bulletin for December, 1887 (XIV, p. 257), Prof. G-reene returned to the 

 subject, further establishing the priority of Salisbury's division of the genus by additional 

 references. In that communication he contended that the oldest Linnsean or iJost-Lin- 

 nœan names are those which genera must bear,' and that Castalia, of Salisbury, is th 

 oldest name, not pre-Linnœan, for the genus that botanists have been calling Nymphœa. 

 He quotes, from Sir James Smith's published correspondence, the letter of the latter to 

 Dr. Samuel Goodenough, Bishop of Carlisle (Sir James's adviser in classical matters), 



e 



1 It is not to be forgotten that certain genera which have come down to us from pre-Linnsean times are the 

 result of the accumulated observations and sagacity of successive generations of botanists. 



