300 MR. W. B. HEMSLET ON A BOTANICAL 



genera, but they collected at lower elevations. It is a note- 

 worthy fact, that above certain elevations and beyond certain 

 latitudes, varying in different parts of the zone, the generic 

 composition of the northern flora is very uniform throughout. 

 In other words, the peculiar genera of the several regions are 

 found at lower elevations and in lower latitudes ; and at great 

 elevations, even in low latitudes, local genera are almost unknown. 

 Among the genera represented by several or many species are : 

 Clematis, Anemone, Cardamine, Corydalis, Hypericum, Rubus, 

 Potentilla, Rosa, Saxifraga, Bibes, Sedum, Lonicera, Senecio, 

 Sausswea, Primula, Lysimachia, Rhododendron, Gentiana, Pedi- 

 cularis, and Cypripedium. 



In addition to new species of essentially Himalayan genera 

 there are many Himalayan species, as: — Clematis montana, 

 Anemone rivularis, Caltha scaposa, Decaisnea insignis, Corydalis 

 ophiocarpa, Stachyurus himalaicus, Hedysarum sikkimense, Mad- 

 denia himalaica, Cyananthus incanus, Cypripedium tibeticum, 

 Paris polyphylla, and Aletris nepalensis. 



Not a few Japanese species extend to the Western provinces 

 of China. Familiar examples are : — Anemone japonica, Euptelea 

 polyandra, Corylopsis spicata, Primula japonica, Habenaria 

 japonica, and Smilacina japonica. Among the ground orchids 

 three are North-American, namely \— Cypripedium arietinum, 

 C. spectabile, and Epipactis gig ant ea. 



It is remarkable that out of about twenty ground orchids only 

 two are local, and most of the others have a wide range, four 

 being British. They include six species of Cypripedium. 



Nevertheless, as already observed, the proportion of local 

 species in the collection as a whole is large. Associated with 

 them are the following British plants :— Caltha palustris, Actcea 

 spicata, Malva sylvestris, Hypericum perforatum, Oxalis Aceto- 

 sella, Geranium Robertianum, Lotus corniculatus, Lathyrus 

 pratensis, Potentilla fruticosa, Agrimonia Eupatoria, Pyrus 

 Aucuparia, Epilobium angustifolium, Circcea alpina, Cephalan- 

 thera ensifolia, Gymnadenia conopsea, and Habenaria chlorantha. 



This does not exhaust the number of British plants in the col- 

 lection, the list being given merely as a sample. Very few ferns 

 were collected, but there is one new Adiantum among them. 



With 



We 



may be gathered from the followiug figures. Taking half-a-dozen 



