290 OBSERVATIONS ON PLANTS 



respect to the memory of tlie celebrated traveller, by whom 

 the fruit of this genus was observed in his first journey, 

 and who, among other services rendered to botany, ascer- 

 tained that the plant producing Gum Kino is a species of 

 Pterocarpus.^ I have formerly endeavoured to distinguish 

 Mimoseae from Caesalpine8e,bythe valvular aestivation of both 

 its floral envelopes, and by the hypogynous insertion of its 

 stamina. Instances of perigynous insertion of stamina have 

 since been noticed by MM. Kunth and Auguste de St. 

 Hilaire ; but no exception has been yet pointed out to the 

 235] valvular aestivation of their calyx and corolla. Parkia, 

 however, differs from other Mimoseae, not only in its aesti- 

 vation, which is imbricate, but in the very manifest irregu- 

 larity of its calyx, and in the inecjuality of its petals, which; 

 though less obvious, is still observable. 



Eri/tJiropJdeim, another genus indigenous to equinoctial 

 Africa, which I have elsewhere' had occasion to notice, and 

 then referred to Caesalpineae, more probably belongs to 

 Mimoseae, although its stamina are perigynous. In this 

 genus both calyx and corolla are perfectly regular, and 

 their aestivation, if not strictly valvular, is at least not 

 manifestly imbricate, though the flower-buds are neither 

 acute noi angular. In Erythrophleum and Parkia, there- 



lisque muUijugis ; stipulis mimitis. Spicae axilla res^ peduncidatce^ clavaice, 

 fiorihus infer ioribus {dimidii cijlindrucei racJieos) Sd'pe masculis. 



Pakkia Africana, pinnis sub-20-ju^is, pinniilis sub-30-jugis obtusis inter- 

 valla sequantibus cicatricibus distinctis parallells, glandula ad basin petioli, 

 racbi commuui eglaudulosa, partialiuni jugis (2-3) summis glandula umbili- 

 cata. 



Inga biglobosa, Talis, de Beauv. Flore d'Oware, 2, p. 53, tab. 90. Sabine 

 in Hortic. Soc. Transact. 5, p. 4:44. De Cand. Prodr. 2, f;. 442. 



Inga Sencgalensis. Be Cand. Prodr. 2, p. 442. 



Mimosa taxifolia. Pers. Sj/n. 2, p. 26G, n. 110. 



Nitta. Park's First Journey., p. 336 — 337. 



^ Paries Second Jotirnei/, p. c:l\\y,v!\\q.\'q it is stated to be an undescribed 

 species of that genus. Soon after that Narrative appeared, on comparing Mr. 

 Park's specimen, which is in fruit only, with the figure published by Lamarck 

 in his Illustrations {tab, 602, /. 4), and with M. Poiret's description {JEncyc. 

 Meth. Botan. 5, p. 728), I referred it to that author's P. erinacea, a name 

 whicli is, I believe, adopted in the last edition of the Pharmacopoeia of the 

 London College. Dr. Hooker has since published a drawing of the same 

 plant by the late Mr. Kummer, and, considering it a new species, has called it 

 Pterorarpus Senegalensis. {Gray's Travels in Western Africa, p. 395, 

 tab. D.) 



2 Tuclceys Congo, p. 430. [^Ante, p. 111.) 



