22 6 THE JOUBNAL OK BOTAN3 



Gaertner, Fruct. i. t. G4. He then {loc. cit.) describes a specimen 

 from India as a new species. G. acutangulus, stating that it is very 

 distinct from C. cestuans in the form of its capsules, which are 

 described as prismatic, with rive sharp angles, of which two project 

 more than the other three, with three bifid points at the summit. 

 He quotes, as synonymous, Plukenet, t. 44, f. 1, of which there are 

 specimens in Herb. Plukenet, undoubtedly G. cestuans ; and we find 

 nothing in Lamarck's description to distinguish C. acutangulus from 

 G. cestuans. 



De Candolle, however (Prodr. i. 504, 505), accepts both names, 

 C. cestuans and C. acutangulus, but includes the former in a section 

 of the genus in which the capsule is without horns at the apex, while 

 G. acutangulus is put in a section in which the capsule has diverging 

 horns. 



Later botanists were apparently misled by De Candolle's arrange- 

 ment, and the species became known as C. acutangulus Lam., as 

 there was no known plant that corresponded with l)e Candolle's 

 G. cestuans. 



Macfadyen (Jam. i. 107) retains C. cestuans, quoting De Candolle's 

 diagnosis, but did not know the plant as described ; he redescribes the 

 true G. cestuans under a new name, G. cunqjestris. 



Grisebach enumerates G. cestuans L. (under which he quotes 

 C. campestris Macf.) and G. acutangulus Lam. ; but did not see any 

 specimens from the West Indies which he could assign to either 

 species. 



To sum up, we have no hesitation in treating C. acutangulus 

 Lam. as a synonym of G. cestuans L., and therefore adopt the eai'lier 

 name, C. cestuans L. 



ALABASTRA DIVERSA.— Part XXXIV *. 



By Spencer Le M. Moore, B.Sc, F.L.S. 



1. Plants Rogersian^e. — VI. 



(Continued from Journ. Bot. 1920, 80.) 



In this part is presented another instalment of Archdeacon Rogers's 

 plants. One of Thorncroft's from Barberton, communicated by the 

 Archdeacon, is also included. 



Geraniace^;. 

 Pelargonium (§ Myrrhidium) Rogersii, sp. nov. Planta ses- 

 quispithamea, caule ascendente subtereti lignoso ad nodos aliquan- 

 tulum tumido sparsim ramoso uti rami subtiliter pubescente ; foliis 

 parvis oppositis brevipetiolatis ambitu ovatis pinnatifidis segmentis 

 paucis obovatis lobatis vel lobulatis (foliorum superiorum maxime 

 imminutorum linearihus integrisque vel fere integris) arete appresse 

 scaberulis haud carnosis ; stipulis late ovatis acutis tarde dehiscenti- 



* Types in the National Herbarium except Schizoglossum Thieleri, returned 

 to Archdeacon Rogers, a small scrap and a drawing- being alone retained. 



