100 ON SEEDLINGS 



Leaves simple, cauline, alternate, exstipulate, alternately penni- 

 nerved, nervation reticulate, glabrous except at the margin and 

 on the principal nerves beneath, deep green above, paler beneath, 

 often stained red in the adult plant ; petiolate, petioles short, deeply 

 channelled above and partly sheathing the stem. 



No. 1. Small, oblong, obtuse, nearly entire. 



Nos. 2-4. Oblong, acute, margin shallowly dentate with the teeth 

 slightly recurved, somewhat oblique at the base. 



CALYCANTHACE.E. 



Benth. et Hook. Gen. PI. i. 15. 



Fruit and Seed. The fruit is an achene containing an 

 oblong or obovoid seed. Several fruits, or few by abortion, are 

 surrounded by the deeply cup-shaped thalamus or receptacle, 

 which increases in size and persists till the seeds are ripe. 

 The seeds are exalbuminous, being wholly occupied with the 

 large embryo, the cotyledons of which are convolute, of very 

 unusual outline. The short radicle is close to the hilum of 

 the anatropous seed. 



Cotyledons. Two genera, including in the aggregate only 

 four well-marked species, constitute the whole of this small 

 Order. They differ widely in the characters of the embryo 

 from all the allied Orders, but show a certain amount of 

 affinity with Magnoliacese through Illicium. The cotyledons 

 are longitudinally convolute, like a roll of manuscript, in both 

 genera, and together with the radicle and embryo occupy the 

 whole of the seed. Those of Calycanthus macrophyllus are 

 apparently unsymmetrical, almost transversely oblong, with a 

 broad, shallow apical sinus, a narrower and deeper sinus at 

 the base, and a notch above a small lobe at the base of the 

 smaller half of each cotyledon. 



Leaves. Typically these are opposite, but occasionally 

 they are slightly alternate by the development of the internode. 

 Being simple and entire, with the principal nerves ascending 

 and incurved, they present no very striking features. The 

 two first pairs of Chimonanthus fragrans are very small, 



