Cockayne. — Development of Seedlings. 385 



above middle, with usually four rather distant teetli ; laminie 

 inclined a little from the horizontal to the vertical. 



Stem brown, branching at an angle of about 45^, alter- 

 nately bifariously pubescent; internodes 3 mm. long; nodes 

 swollen and purple, especially at junction with petiole. 



No. 345. Coprosma acerosa, A. Cunn. Plate XXXIV., 

 figs. 69, 72. 



(Erect var., as found in mountainous situations.) 

 Seed collected from plant growing amongst other shrubs 



at base of Mount Earnslaw, Lake Wakatipu. Germination 



very slow ; some of the seeds did not germinate until twelve 



months from date of sowing. 



'o* 



Description of Seedling. 



Eoot straight, deeply descending, with a few yellow lateral 

 rootlets. 



Hypocotyle 4 mm. long, becoming rather longer as plant 

 developes. 



Cotyledons 5-5 mm. x 2 mm., narrow linear-oblong, slightly 

 widest near base, obtuse, patent, rather thick and coriaceous ; 

 petioles very short ; midrib evident below. As the plant de- 

 velopes the cotyledons increase in size, and are persistent 

 until the 6th or 7th leaves appear. 



Stem woody, terete, swollen at nodes, with internodes, in 

 plant 4 cm. high, 1st 5 mm. long and 4th 9 mm. long, pale 

 yellowish-brown dotted with red or purple, pubescent every- 

 where, with numerous very short hairs. 



1st pair of leaves 7 mm. or 8 mm. x 2-5 mm., linear-ob- 

 long, obtuse, green, brownish on midrib and margin or entirely 

 brownish on upper surface, which has numerous minute scales 

 and a few white hairs in fascicles, paler and scaly on under- 

 surface, obtuse ; margins minutely serrulate ; midrib evident. 



Succeeding leaves much same as 1st pair, often concave 

 above, patent and bending downwards for upper half, but the 

 later leaves are acute, with often a triangular apex, the margins 

 below being quite parallel, green or stained with brown as 

 before. 



Stipules : Two, surrounding leaf-bases, interfoliar, connate, 

 triangular, hairy, with from one to three glandular swellings 

 at apex (Plate XXXIV., figs. 72, 69). 



Further development : From each axil in the most de- 

 veloped plants a pair of leaves are being developed at right 

 angles to the axis of the earlier leaves. 



Variations : The seedlings vary slightly in the amount of 

 pubescence, the purple-stemmed being the most pubescent. 

 In some plants there are slighter broader leaves than those 

 described, and one is subcordate at the base. 

 25 



