x 45 
Species of the New Zealand Orchidaceae. 
endodermis in Bulbophyllum pygmaeum and B. tuberculatum ; almost every 
cell in the outer portion of the cortex of Dendrobium Cunninghamii contains 
one or more large disorganizing masses. 
5. a. An internal cylinder of sclerenchyma and starch in cortex and 
ground tissue occur in stem and branch of Earina mucronata\ there is no 
complete sheath of sclerenchyma in E . suaveolens. 
b. A peripheral cylinder of sclerenchyma and chlorophyll in cortex and 
ground tissue are present in Dendrobium Cunninghamii. 
c. In Bulbophyllum pygmaeum the inner half of the cortex and the 
ground tissue contain chlorophyll. 
d. In B. tuberculatum and Sarcochilus adversus raphides cells occur 
throughout the assimilatory tissue. 
6. a . Isolated sclerenchyma strands are present in the leaves of the two 
species of Earina ; a 1 palisade ’ arrangement of thin-walled cells containing 
little chlorophyll occurs beneath the upper epidermis of E. suaveolens. 
b. Very large vascular sheaths but no isolated strands are present 
in Dendrobium Cunninghamii ; its wide epidermis is mucilaginous. 
c. The leaves of the species of Bulbophyllum are succulent ; mucilagini- 
zation takes placo in the walls, especially in those of the epidermis ; 
pseudo-bulbs are present. 
d. The leaf of Sarcochilus adversus is very succulent ; great numbers 
of raphides cells occur throughout. 
I am indebted to Professor J. C. Johnson, University College, Auck- 
land, N.Z., for criticism and guidance, and, later, to Professor J. B. Farmer, 
Imperial College of Science and Technology, South Kensington, for advice 
on several points. 
Imperial College of Science and Technology. 
Literature. 
1 . Burgeff, H. : Die Wurzelpilze der Orchideen. Jena, 1909. 
2 . Chatin, Ad.: Anatomie des plantes de l’ordre des Orchidees. i er M6m. : Anat. des racines. 
Mem. dela Soc. des sc. nat. de Cherbourg, t. iv, 1856. 2 e Mem. : Anat. dn rhizome, de la 
tige, et des feuilles. Mem. de la Soc. des sc. nat. de Cherbourg, t. v, 1857. 
3 . Cheeseman, T. F. : Manual of the New Zealand Flora. 
4 . Constantin, J. : Recherches sur l’influence qu’exerce le milieu sur la structure des racines. 
Ann. des sc. nat., Bot., 1885, ser. vii, t. i, p. 140. 
5 . Goebel, K. : Pflanzenbiologische Schilderungen, Teil i, p. 188. 
6. Janczewski, Ed. de : Organisation dorsiventrale dans les racines des Orchidees. Ann. des sc. 
nat., Bot., 1885, ser. vii, t. ii, p. 55. 
7 . Leitgeb, H. : Die Luftwurzeln der Orchideen. Denkschriften der K. Akad. der Wissenschaften, 
vol. xxiv, 1865. 
8. Schimper, A. F. W. : (a) Ueber Bau und Lebensweise der Epiphyten Westindiens. Bot. 
Centralblatt, 1884. (£) Die epiphytische Vegetation Amerikas. Jena, 1888. 
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