228 Analysis of Periodical Works on Natural History. 



and Arnica Bellidiastrum is represented as not quite certain. — Coreopsis 

 tiitctoria, discovered by Professor Nuttall in the Arkansa territory, North 

 America. —JAomrda Russeliana, "caule acutangulo bisulcato, foliis ovatis 

 acuminatis basi rotttndatis ; int'erioribus serratis, labio inferiore revolnto 

 gnttato." — Euphorbia carinala, one of the species of the section which 

 Mr. Haworth has made into a genus under the name Crepidaria. — 

 Malva prostrate, belonging to the fourth of M. Decandolle's sections, of 

 which Moench has formed his genus Modiola. — Ophrys Arachnites, from the 

 collection of C. II. Turner, Esq., who brought it from Switzerland. 



The Botanical Register. No. 1 1 5. 



PI. 825. Isochilus prolifer, a West Indian plant very rare in this country, 

 belonging to the section Epidendrea of Mr, Brown's arrangement ofOrchide- 

 ous plants. — Leucadendron tortum, described by Mr. Brown in his account 

 of the Proteacerr, Linn. Trans, x. 56. — Ardisia punctata, " foliis lanceolatis 

 coriaceis sinuatis versus basin attenuatis, corolla subcampanulata punctata: 

 lobis obtusis:" brought from China in 1822 by Mr. John Potts, a meri- 

 torious collector, who died in the service of the Horticultural Society. — 

 Cunonia capensis. " The natural order Cimoniacea" Mr. Brown remarks, 

 " several of whose genera have been referred to Saxifrages, is more readily 

 distinguished from that family by its widely different habit, than by any very 

 important characters in its fructification." — Rosa moschata, var. nepalensis. 

 — Dolichos purpureus. — Arum crinitum, a most singular plant, native of Mi- 

 norca. " The remarkable organ," observes Mr. Lindley, " which in this 

 genus represents the flower, and by botanists is termed spatha, is a leaf un- 

 der a peculiar form of development, assuming the colour, and probably the 

 office, of corolla. It is one of those deviations from the usual order of Nature, 

 which assist the philosophical botanist in understanding the origin of similar 

 organs which have departed more completely from what may be called their 

 primitive forms, and which, with cohesion of parts and alteration of figure, 

 take on new appearances and functions, by which they are so far disguised 

 as to be recognised only in the few plants in which their transition from 

 one form to another has been, as it were, arrested in the middle, and re- 

 mains incomplete. 



" The spatha of the Arum, which is manifestly a coloured leaf, goes far 

 in support of the ingenious theory of M. du Petit-Thouars*, that all parts 

 of the flower and fruit are modifications of leaves, or leaves in an altered 

 form ; or, to employ his own expression, — * que la Fleur n'est autre chose 

 que la transformation d'une Feuille et du Bourgeon qui en depend ; que la 

 Feuille donne Calice, Corolle, et Etamine, et que le Bourgeon devient le 

 Fruit produisant la Graine;' and that the bud of a tree and the seed of a 

 tree differ chiefly in this, that the former is an ' Embryonftxe,' a stationary 

 embryo, and the latter an ' Embryon mobile? or moveable embryo. The 

 points upon which this curious speculation depends for support are, that 

 there are no limits between leaves, bractese, calyx, and corolla; that, in 

 double or monstrous flowers, the stamens and ovaries become foliaceous j 

 that anthers occasionally secrete ovula ; that ovaries are known to become 

 polliniferous ; that every compound calyx, corolla, or ovary, can be shown 

 to be made up of a determinate and relative number of simple parts; and, 

 finally, that all these organs, in regular flowers, in which no abortion or 

 obliteration has occurred, are produced about their axis, as the leaves 

 about their stem, in a spiral, or, by depression and approximation, verti- 

 cillate, manner." 



* See above, p. 81. 



XL. In- 



