318 MR. BENTHAM ON TROPICAL LEGUMINOSE. 
XIX. CYNOMETRA, Linn.; Benth. et Hook. f. Gen. Pl. 586. 
The species now more or less known of this genus are numerous, dispersed over the 
tropical regions of the New as well as the Old World, and require a careful re- 
vision to determine their limits. The following two new ones however, peculiar to 
Africa, are so distinct in aspect, in their petal-like bracteoles, and in some points of 
structure, that I have proposed to establish for them a distinet section, under the name 
of Hymenostegia, thus characterized :— 
Bracteole membranaceæ, petaloidez, persistentes. Calycis tubus discifer turbinatus. Petala 2 infima 
minuta. Ovarii stipes tubo calycino hinc adnatus. 
The pod is unknown, except from an old detached valve in Welwitsch's collection, 
which indicates that it is much larger and of a thinner consistence than in the other 
species. 
1. C. FLORIBUNDA, sp.n. Foliolis 4-jugis oblique trapezoideis, racemis laxis floribundis, 
bracteolis ovatis cordatisve petaloideis, petalis 2 infimis minutis. 
. Arbor 80-pedalis. Folia adulta glabra, petiolo communi 12-2-pollicari ; foliola sessilia, obtusiuscula, 
jugi ultimi 1-14 poll. longa, inferiora minora, coriacea, basi apiceque valde inæquilatera, costa subtus 
prominente, tenuissime pennivenia. Stipulæ inconspicuæ. Racemi in axillis summis, 2-3-pollicares, 
panieulam efficiunt pulchram foliatam, rhachi hirtella a basi florifera. Pedicelli 3-4 lin. longi. 
Bracteolæ infra apicem pedicelli patentes, obtusæ, 3-lin. v. paullo longiores. Calyx glaberrimus ; 
tubus late turbinatus, 11 lin. longus; limbi segmenta 4, lata, subpetaloidea, per anthesin reflexa, summo 
latiore. Petala 2 lateralia obovato-oblonga, in unguem angustata, erecta, 3-4 lin. longa; summum 
intimum, paullo minus et angustius; 2 infima minuta, linearia. Stamina 10, libera, 5 petala supe- 
rantia, 5 alterna breviora. Ovarium villosissimum, stipite brevi calycis tubo hine breviter adnato; 
stylus elongatus, glaber, stigmate vix dilatato. 
Hab. West tropical Africa. On the River Mani, lat. 1* N. (G. Mann). 
2. C. LAXIFLORA, sp.n.  Foliolis 1-2-jugis falcato-ovatis acuminatis, racemis longis 
paucifloris, bracteolis ovato-subcordatis petaloideis, petalis 2 infimis minutis. 
Arbor 25—35-pedalis et altior, glabra. Foliola pleraque unijuga, 2—4-pollicaria, basi valde obliqua, per 
anthesin membranacea, demum coriacea, nitidula, costa prominente, tenuiter pennivenia, addito 
nonnunquam pari inferiore foliorum multo minorum. Racemi terminales, simplices, pauciflori. 
. Pedicelli graciles, 4-5 lin. longi. Bracteole omnino C. floribunde, nisi paullo majores, et florum 
structura eadem in alabastro apparet, perfecte evolutos non vidi, 
Hab. West tropical Africa. District of Golungo Alto (Welwitsch). 
