SIR J. LTJEEOCK — niTTOEIOLOGICAL OBSEnvATIO^'S. 



357 



Sometimes tlicy are sessile, as Acer (fig. 9), Ilalcea (fig. 21), 

 Laburnum (fig. 20), &c. ; sometimes tliey are supported on petioles, 

 as in ^licroloma (fig. 29), wliicli again are occasionally connate. 

 Tliese diflerences sometimes occur in very closely allied species; 

 for instance in JDelpliinium Staplilsarjria (fig. 31) the cotyledons arc 

 sessile, -wliile in D. elatum (fig. 30) tliey are petioled, and in 

 i*. nudiccnde (fig. 32) tlie petioles are connate. 



Generally tlie cotyledons are entire, but sometimes crenate, as 

 in Cordla (fig. 33), or loLed, as in Pelargonium (fig. 34) and 



Fig. 33. 



Fig. 34. 



Seedling of Cordla sithcordata 



Half nat. size. 



Seedling of Pela7'gom7fm aiistralc, 



Half uat. size. 



Mc 



Often they are emarginate, as in Impatiens 



dallum (fifr. 114), i^ 



JP 



39), &c. JVay, they are sometimes even bifid, as in Eschsclollzia 

 (fig. 40) and Ijwmcca clasy.^perma (fig. Ill) ; trifid, as in the Cress 

 {Lepidium, fig. 4), or in four long lobes, as in Tjerocarija (fig. 41 ). 

 Sometimes auricled at the base, as in Foterium (fig, 42) and 

 Quplea. Sometimes they are large ; sometimes small. Generally 

 they are leaf-like ; but sometimes, as in liJius Thinlergii (fig. 44), 

 ^apinchis (fig. 43), and among English plants in t' 



LINN. JOUKN. 



XXII 



