Thuya occidentalis " orientalis " gigantea (doubtfully) Thuyopsis dolabrata " Chamaoyparis sphaeroidea (Retinospora) pisi-fera and vars. " obtusa and vars. nutkaensis (doubtfully) J uniperus Chinensis.

" communis and vars. " Japonica " Sabina " Virginiana Taxodium distichum.

" (Glyptostrobus) Sinensis Taxus baccata (doubtfully) " " var. Canadensis " adpressa Ginkgo biloba Sciadopitys verticillata Ceplialotaxus drupacea Pinus Banksiana " Bungeana " cembra.

" contorta var. Murray-ana " densiflora " edulis " excelsa " flexilis " Gerardiana " inops " Koriensis.

" Lambertiana (doubtfully) " Laricio " " var. Austriaca.

(short-lived) " Mandshurica " montana.

Pinus Jeffreyi.

" pungens.

" pyrenaica.

" ponderosa.

" parviflora.

" rigida.

" resinosa.

" Strobus Picea alba.

" Alcoquiana.

" Ajanensis.

" Engelmanni.

" excelsa.

" nigra.

" obovata.

" orientalis.

" polita.

" pungens.

" Sitchensis Tsuga Canadensis.

" Mertensiana.

" Pattoniana (doubtfully).

" Sieboldii Pseudotsuga Douglasii Abies amabilis.

" balsamea.

" con color.

" Cilicica.

" Fraseri.

" flrma.

" nobilis.

" Nordmaniana " pectinata.

" Siberica.

" subalpina (doubtfully).

" Veitchii Pseudolarix Kaempferi Larix Americana.

" Dahurica.

" Europaea.

" leptolepis.

I have drawn up the above list at the request of Sir Joseph Hooker. Following is a list of those hardy in the St. Petersburg Botanic Garden. A comparison of the two lists may interest some of your tree-cultivating readers.

Abies balsamea, Sibirica.

Juniperus communis, nana, Sabina, prostrata.

Larix Dahurica, Europea, Siberica,

Picea alba, Engelmannii, Schrenkiana (nigra, rubra both dubious) Pinus Cembra, contorta, Montana, Pumilis Strobus, sylvestris Thuja Occidentalis Pseudotsuga Douglasii (doubtful) Retinospora obtusa, filifera, pisifera (doubtful)