450 FLORA NIGRITIANA. 
to in the Congo Appendix as a new genus, with a flower 
resembling that of Vahea and the fruit that of Voacanga, or 
Urceola. Some other new plants from Congo and Sierra Leone 
are also alluded to on the same occasion : they are however un- 
known to us. 
The Malouetia Heudelotii, A. DC., appears to be confined to 
Senegambia. 
1. Vinca rosea, Linn.—Cape Coast, Vogel—A common plant 
in the warmer regions of both hemispheres, especially near 
the sea, but said to have been introduced only into Africa 
and Asia from America. It must be observed, however, that 
all the other species of Vinca belong to the Old World. 
The Plumiera Africana, Mill., said to have been raised from 
seeds sent by Adanson from Senegal, has not since been found 
in that country. The Adenium Honghel, A. DC., is a Senegalese 
plant, differing but very slightly from the A. obesum, R. et S, 
which extends from Nubia to Delagoa Bay. : 
l. Holarrhena Africana, A. DC. Prod. 8. p. 414..—Rondeletia 
floribunda, G. Don, Gard. Dict. 3. p. 516.—Sierra Leone, Don. 
The two other W. African species, H. landolphioides, À. DC., 
and H. ovata, A. DC., are both from Senegal. 
1. Isonema Smeathmanni, Reem. et Schult.—A. DC. Prod. 8. 
p. 415.—Grand Bassa, Vogel, Ansell; Senegambia, Heu- 
delot. : 
Ramuli juniores, inflorescentia et flores pilis brevibus pube- 
scentes, rami adulti glabrati. Folia brevissime petiolata, 
obovali-oblonga, vix acuminata, basi obtusa, 3-4 poll. long& 
1-14 poll. lata, rigidule membranacea, supra glabra, subtus 
ad venas hirta et inter venas pilis nonnullis conspersa. Cyme 
opposite, breviter peduneulatz, in thyrsum seu paniculam 
terminalem 3-4-pollicarem disposite, singule 6-10-florz. 
Bractee parve, acute. Flores a pedicello brevi recurvo 
nutantes. Calyx linea paullo longior, lobis acutiusculis ; 
glandule baseos geminatim v. interdum ternatim aP- 
proximatze, cum laciniis calycinis alternantes. Corolle tubus 
cylindricus, 4 lin. longus, extus velutinus, intus ad medium 
annulo denso pilorum clausus et lineis 5 “pilorum a stamini- 
