Cockayne. — Development of Seedlings. 365 



and smaller, until one, and then both, are suppressed, only a 

 very small terminal leaflet being produced. Finally leafless 

 cladodes are developed from the lower nodes, sometimes at 

 first furnished with one or two minute leaflets. 



Leafless cladodes flat, dorsiventral, distichous, usually 

 curving downwards, notched at nodes, furrowed on both 

 surfaces but more so on under-surface, canescent on upper 

 surface, often stipulate on upper margin of notch. 



The leafless species of Carmichcelia seem to exhibit usually 

 three stages of development — first, a wiry (Plate XXX., 

 fig. 9) or thick - stemmed (Plate XXX., fig. 8) seedling, 

 with simple or compound leaves ; second, leafy cladodes 

 arising from the axils of the primary leaves ; and third, quite 

 leafless cladodes, often extremely thick and stout. The 

 second form may be artificially produced in an adult leafless 

 plant by cultivation in shady, sheltered, moist situations 

 (see Plate XXXI., fig. 13) ; such also occurs spontaneously 

 in a state of nature, but I have not had an opportunity as 

 yet of accurately investigating such a change. Certainly 

 shade and its accompanying moisture is here also a factor. 

 G. flagelliformis, on the Port Hills, is in full sunshine leafless 

 or almost so, and in shade of trees a quite leafy plant. Com- 

 pare also the permanently leafy (deciduous in winter) G. 

 grandiflora, growing only in positions where it receives the 

 full western rainfall, it being the common Garmiclu^lia of 

 Westland, with the leafless G. robiosta'''- of the Trelissick Basin. 



Carmichselia gracilis, Armstg.f Plate XXX., figs. 1, 2. 



(Syn. G. kirkii, Hook, f.) 



Seed collected from one plant, growing in rather swampy 

 ground, at foot of sand-dunes near New Brighton, Canter- 

 bury. Germinated in about ten days. 



Description of Seedling. 



Boot long, straight, white, fleshy at base, with numerous 

 lateral rootlets. 



Hypocotyle stout, very rigid, terete, tapering from the base 

 upwards, smooth, glabrous, pale, tinged at times with purple, 

 5 mm. long, partly subterranean, at times slightly flexuous. 



Cotyledons extremely fleshy, persistent for a considerable 

 time, increasing in size, at first 7 mm. to 8 mm. x 4 mm. to 

 5 mm., finally even 1-6 cm. x 9 mm., and 1'25 mm. thick, un- 

 symmetricaliy oblong or obovate-oblong, entire, with purple 



* Of course, it must be a matter of doubt what plant was meant by 

 Kirk as C. rohusta without access to his unpublished work, and to his 

 herbarium, lately acquired by the New Zealand Government. 



t " Descriptions of New and Rare New Zealand Plants," by J. B. 

 Armstrong (Trans. N.Z. Inst., vol. xiii., p. 336). 



