272 Mr. Haworth's DescriptioJi of ne-jo Succulent Plants. 



they are all now flourishing. They appear to belong to the 

 Linnasan genus Cotyledon ; at least as it now stands. 



They all likewise appear, thus far at least, to be unrecorded 

 species ; and belong to two very distinct divisions of the genus, 

 the last of which, Parviflor.-e, will hereafter, from its in- 

 cluded unequal stamina, and furfuraceous appearances, be- 

 come the type of a new genus : when we shall become suffi- 

 ciently acquainted with its component species and fructifica- 

 tion ; and I propose for it the name Pitukea, a voce 'junvgov 

 furfur. 



In all probability also, Cotyledon coccinca of Cavanilles will 

 be the type of another new genus; and the species allied to 

 C. umbilicus, that of a third. But these speculations must at 

 present be relinquished, for want of sufficient specimens. 



The species of the first Section of Cotyledon, in the present 

 Decade, are nearly all, very stately plants, with showy termi- 

 nal dichotomously cymed bunches of large pendulous flowers, 

 of a deep aurora colour, approaching to scarlet, with exerted 

 equal stamina, and are produced every summer upon old plants. 

 The species of this division too, are easily propagated from 

 cuttings in the usual way; love sandy earth, and will thrive 

 m any good greenhouse : and indeed, many of them make a 

 fine appearance there ; being conspicuous ornaments even 

 when out of bloom, through the great contrast formed by 

 their broad mealy leaves, with the more ordinary foliage of 

 evei'y greenhouse. 



And the section of the genus PARViFLORiE, hereunder further 

 explained, and which I have above proposed to call Piturea, 

 is very interesting, in a philosophical point of view, because 

 some at least of its component species have the remarkable fa- 

 culty of gradually by day-light opening, and even retrofracting 

 their blossoms, and of again closing them, in the same day ; 

 and this for several days successively. 



Nor are these plants all, which may hereafter recede ge- 

 nerically from the present genus Cotyledon, many recorded 

 species of which are at present but little understood. 



With respect to the remaining plants which complete this 

 decade; one is a new Gasteria, and the remaining three be- 

 long to the succulent aphyllous division of the genus JLitphor- 

 hia of LinnjEUs; and were also discovered in South Africa, by 

 Mr. Bowie, and are now flourishing in the greenhouses of the 

 royal gardens at Kew, where I have made the following de- 

 scriptions of them. 



Chelsea, Dec. 7, 1826. A. H. Haworth. 



Decas 



