6 THE GEXFS :\rA>fETTTA 



adnate, more or less, to the hollow disc. This character is of consider- 

 ahle importance, in so far as it is constant and of discernible degree. 

 But the tubular condition of the calyx at the base is observable to a 

 greater or less extent throughout the genus, a corresponding extent of 

 adnation to the rather pronounced disc following as a matter of 

 developmental course. In the following species the existence of a 

 basal " calyx-tube " is manifest, and these may reasonably be included 

 in a separate section, § YsoiNA^fTHUS of K. Schumann; they are 

 arranged in the order of the present memoir : — 



tnitis K. Schiim. 



fiinbriata Cham. & Schl. 

 *Pearcei Wernham. 



hispida Poepp. & Endl. 



miniata Ch. Lem. 

 *dominicensis Wernham. 



*tarapotensis Wernham. 



pectinata Sprag-ue. 



pleiodon K. Schum. 



glandulosa Poepp. & 

 Endl. 

 *costaricensis Wernham. 



*8praguei Wernham. 



coccinea Willd. 

 * Sanctse-Martse Wern- 

 ham. 

 '*orbifera Wernham. 



divaricata Wernham. 



I propose to retain these four sections (svibgenera) as arranged by 

 Schumann. To summarize, in the following sj^stematic account 81 

 spacies are recognized, of which 34 are described for the first time. 

 Of these 81, § Ptrrhanthos has 12, § Heterochlora 9, § Lr- 

 GiSTUM 42, § YsGiNANTHUS 16, the remaining 2 being of doubtful 

 affinity. 



At this juncture we may perhaps ventui'e upon a critical deserijition 

 of the genus. Preceding this, in the usual way, we have to consider 

 the question of the Nomexclature. 



In the light of the preceding history, this offers no great difficulty. 

 It is necessary, however, to point out that, in accordance with strict 

 rule, the genus should be named not Manettia, but Lygistum — this 

 name dating from 1756, while the previous more familiar name was 

 jiublished in 1771. Such change of generic nomenclature has already 

 been proposed by Otto Kuntze, in his Revisio Generum Plantarum 

 of 1891 ; but such alterations, however correct, are greatly to be 

 deprecated. The name Manettia has been so long and so well estab- 

 lished that almost every gardener is familiar with it, in connection 

 with such well-known hot-house species as M. cordifolla, M. hicolor, 

 M. coccinea ; and the name Manettia should be indeed a nomen con- 

 servandum, a name to be preserved. 



The correct names of the separate genera, were the sections to be 

 raised to generic rank, forms an interesting problem in nomenclature. 



The synonymy of the genus-name, then, will appear thus : — 



Manettia Mutis, in Linn. Mantiss. (1771) 553. 



Lygistum P. Browne, Hist. Jam. (1756) 142, t. 3. f. 2. 

 Petesia Linn. Syst. Nat. ed. x. (1759) 8d4^,ex parte, nee P. Browne. 

 Nacihea Aublet, PL Guian. i. (1775) 95, t. 37. 

 Nacibcea Poiret, in Lam. Encyc. Meth. iv. (1798) 415. 

 Bellardia Schreb. Oen. PL i. 790. 

 Guagnehina Veil. PL Flum. 44, tt. 115-121. 



Gonotrichia A. Eich. in Mem. Soc. Hist. Nat. Paris, v. (1829) 

 277, t. 14. f. 1. 



