CUPRESSUS THYOIDES. 231 



Cupressus thurifera, Huniboldt, Bonpland and Kunth, Nov. Gen. et Sp. II. 3 

 (1815). Schlechtendal in Linnsea, XII. 493 (1838). Parlatore, D. C. Prodr. XVI. 

 473. Gordon, Pinet. ed. II. 100. Masters in Journ. Linn. Soc. XXXI. 349. 



C. lusitanica Benthamii, Carriere, Traito Conif. ed. II. 155. 

 ' Chamsecyparis thurifera, Endlicher, Synops. Conif. 62. 



Cupressus thurifera was originally discovered by Humboldt at the 

 beginning of the nineteenth century near Tasco and Tehuantepec in 

 Mexico. It has since been reported from other localities mostly alpine 

 or sub-alpine at a considerable elevation but its geographical limits are 

 not yet accurately known. It is cultivated in botanic gardens in the 

 south of Europe, notably in that of the Marchese Hanbury at 

 La Mortola whence were received the materials on which the above 

 description is chiefly founded. Although not hardy in Great Britain, 

 notice is taken of it here for the purpose of completing the monograph 

 of the genus. 



Oupressus thyoides. 



A tall slender tree with a trunk frequently 70 80 feet high and 

 2 3 feet in diameter, with thickish light red-brown bark and short, 

 slender, spreading branches forming a spire-like crown. Branchlets with 

 smooth, reddish brown bark and ramified distichously, each ramification 

 terminating in flat fan-like leafy expansions ; in poorly growing trees 

 in Great Britain, in pseudo-corymbose tufts. Leaves in decussate pairs, 

 small, scale-like, ovate, acute, closely imbricated and glandular on the 

 back ; 011 the axial growths longer, the lateral pairs keeled, more acute 

 and free at the apex, dull bluish green turning to rusty brown in 

 winter. Staminate flowers four-angled with five six pairs of stamens 

 each with an oval connective bearing two anther-cells. Strobiles very 

 numerous, globose, about 0'25 inch in diameter, composed of six 

 glaucous green imbricated scales each bearing one two seeds. 



Cupressus thyoides, Linnaeus, Sp. Plant. II. 1003 (1753). Michaux, Hist. Arb. 

 Amer. III. 20, t. 2 (1813). London, Arb. et Frut. Brit. IV. 2475, with figs. 

 Hooker, W. Fl. Bor. Amer. II. 165. Heopes, Evergreens, 314, t. 55. Kent in Veitch's 

 Manual, ed. I. 238. Masters in Journ. R. Hort. Soc. XIV. ; and Journ. Linn. Soc. 

 XXXI. 352. Sargent, Silva K". Amer. X. Ill, t. 529. 



Chamsecyparis sphreroidea, Spach, Hist. Veg. Phaner. XI. 331 (1842). Endlicher, 

 Synops. Conif. 61. Carriere, Traite Conif. ed. II. 121. Parlatore, D. C. Prodr. 

 XVI. 464. Gordon, Pinet. ed. II. 71. Beissner, Nadelholzk. 65, with tig. 



Thuya sphseroidalis, L. C. Richard, Mem. sur les Conif. 45 (1826). 



T. sphteroidea, Macoun, Cat. Canad. Plants, 46. 



Eng. and Amer. White Cedar. Fr. Cedre blanc. Germ. Weisse-Ceder, Ceder- 

 Cypresse. Ital. Cedro bianco. 



var. ericoides. 



A juvenile form (Jugendform) of somewhat rigid columnar habit, the 

 foliage consisting entirely of primordial linear, close-set leaves, glaucous 

 green above, and with two stomatiferous lines beneath. In winter the 

 branchlets with their foliage change to a reddish brown or reddish violet 

 colour. 



C. thyoides ericoides, Masters in Journ. Linn. Soc. loc. cit. Chamsecyparis 

 sphteroidea ericoides, Beissner, Nadelholzk. 67, with fig. Juniperus ericoides, 

 Hort. Retinispora ericoides, Hort. 



