NOTES AND OBSERVATIONS. 157 



*** Stamen tube divided into about fifteen clusters. 



Corolla green and white: glands present: stamens and style 

 yellow or white below, red above, * . P. aquatica. 



Explanation of plate 27. Fig. 1, flowering branch of Pachira species, 

 half size; fig. 2, calyx, natural size; fig. 3, one cluster of stamens, 

 natural size; fig. 4, anther, enlarged; fig. 5, seed, natural size. 



2. Crassula quadrifida baker.* 



This pretty, partly shrubby species, which, as Mr. Baker 

 has pointed out, is quite exceptional in the genus Crassula 

 by its constantly tetramerous flowers, has this year devel- 

 oped in the greenhouse a proliferous habit, forming 

 numerous small rosettes of leaves in the otherwise normal 

 inflorescence. The leaves of these clusters, except for 

 their smaller size, are similar to those of the stem, and 

 quite like those which are frequently clustered in the lower 

 axils. Like the stem leaves they are conspicuously pitted. 



The appearance of such a proliferous plant, and the 

 details of its inflorescence, are well shown in plate 28 and 

 the accompanying engraving. 



* Baker, Refugium Botanicum (1873), pi. 298; Nicholson, Dictionary, 

 Div. 2, 392. 



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