Unona.] fi,oba indica. 131 



longitudinem sulcatus. Oarpella indefinita. — Arbores erectts vel fru- 

 tices scandentea, floribus majusculis axillaribus vel extra-axillariius ple- 

 rumque soUtariis. 



If we except the last section, the species of this geaus are readily known by their 

 elongated fruit, separated by constrictions into one-seeded joints. This structure 

 occurs in no other genus of the Order, We have, however, abstained from intro- 

 ducing it into the generic character, because we are unwilling for the present to 

 separate from the genus several species in which the fruit is unknown, aud one at 

 least in which it is not jointed. All these species agree with the more typical Unono!, 

 in the thin, more or less elongated petals, in the shape of the ovary and style, and in 

 the ovules being definite in number, and inserted into the ventral suture in a single 

 row. These characters appear to us constant, and they are, we believe, sufficieut to 

 characterize the'genus, without its being necessary to have recourse to the fruit. One 

 or two species are scandent, while the majority are erect; but there is a great simi- 

 larity in general aspect in all. The young leaves and petals are always pellucid- 

 dotted. When the ovules are reduced to two, the genus approaches very close to 

 Polyalthia, but is readily distinguished by the position of the ovules. That genus is 

 also well marked by the nervation of the leaves, which is peculiar, and very diiferent 

 from that found in Unona. The section Dasymaschalon is remarkable for the entire 

 suppression of the inner petals, but its habit is quite that of the typical Unonm ; and 

 the other characters (especially the fruit) are so identical, that it does not appear to 

 us advisable to separate it. Unona is entii'ely an Asiatic genus, nor do we know 

 any. species in addition to those described below, except U. virgata, Blume, which 

 appears to be referable to our section Pseudo- Unona. 



Sect. 1, Desmos. — Petala 6. Carpella inter semina constricta. 



1. U. dumosa (Roxb. M. Ind. ii. 670) ; scandens, foliia obovatis 

 vel ovalibus basi cordatis supra glabris subtus dense tomentosis, pe- 

 dunculis extra-alaribus gracilibus pendulis, petalis obovatis spathulatis 

 apice angustatis, carpellis 3-3-artieulatis. — Wall. Cat. 6429 ! 



Hab. In provincia Silhet, Uoxhurgh, Wallich! — (PI, Apv., fr. Oct.) 

 (., s.) 



Fruiex dumosus, scandens, ramis griseis, rugosis, junioribus fulvo-pubescentibus ; 

 partes novellffi dense fulvo-tomentosse. 'Folia obtusa vel acuta, 3-5 poll, longa, li- 

 2i lata, petiola vix J-poll., juniora utrinque pubescentia. Peduncitli siepe opposili- 

 folii, 1-lJ-poll., tomentosi, supra medium vel prope basin braeteola 1 ovata tomen- 

 tosa -l-poU. longa munita. Sepala late ovalia vel fere rotundata, basi cordata, acuta, 

 tenuia, nervosa, glanduloso-punctata, utrinque sericea, semipollicem louga. Petala 

 tenuia, nervosa, glanduloso-punctata, utrinque adpressa, pubescentia ; exteriora fere 

 tripollicaria, 1-li poll, lata, obtusiuscula, basi in uuguem latum augustata ; interiora 

 paullo breviora et angustiora. Torus medio depressus. Ooaria triovulata. Stigma 

 breve, obovatum. 



The fruit is only known from Eoxburgh's description, unless Uoaria heterocarjia, 

 Bl. Fl. Jav. Anon. 41. t. 17. belongs to this species, which, from the general resem- 

 blance, is probably the case. I hesitate, however, to quote that species, because it has 

 stellate hairs, which I have not found in the plant now described ; they are, however, 

 very densely compacted, and may occasionally be stellated. Blame's plant is from 

 Java, but of doubtful locality. The carpels are pubescent, and have from one to two 

 joints, of the size of a pea, the terminal one inucronate. 



2. U. Dunalii (Wiill. Cat. 0425 !) ; scandens, foliis oblongis vel 

 oblongo-Ianceolatis submembranaceis utrii>que glabris vel subtus sparse 



