156 ' DB. B. SPRUCE OK IJDesmonciis. 



I have examined too few flowers and fruits of Besmoncus to be 

 able to institute a tborough comparison with those parts in Bac^ 

 tris ; but in the former the petals of the c? flowers are drawn out 

 into slender points, whereas in the latter they are merely acute ; 

 and the endocarp of Besmoncus is so thin that the fruit has barely 

 a claim to be called a drupe. 



t 



1. D. RiPABius, sp. n. 



Ilab. in ripis fluminis Negro prope pagum San Carlos {S, hh. Palm. 



46). 

 Caudex tenuis (diametro semipoUicari) flexuosus, arboribus vicinis ope 



foliorum cirrhiferorum alte scandeiis^ foliosus. 



Folia 3-pedalia pinnata ; petiolits vaginans j vagina inermis, in ocream 

 3-pollicarem ore obli(][uam longiciliatam producta ; rhachis glabrata 

 aculeis validis nigrescentibus deorsum imcinatis per totam longitu- 

 dinem armata ; pinnce 14-16-jug8e, inferiores oppositse vel subaltemse; 

 Sxl^-poUicarea ad 7 x If -pollicares, lanceolatae tenuiacmninatse, 

 basi in petiolulum spurium attenuatae, plicatae, subtus ad costam 

 plerumque aculeis 2 dissitis rectis squarroais armatae, jugorum 6 v. 

 7 superiorum in spinas cirrhosve exacte oppositos subpoUicares su- 

 bulatos acute retrorsos (sed rectos nee uncinates) mutatse. 



Sjnidices 9-pollicares (pedunculo sub-5-pollicari incluso) simpliciter 

 ramosi subpinnati, axi rectiusculo j 7'a77it 8-10 sesq^uipoUicares tenui- 

 usculi spiraliter flexuosi, alveolis hand profundis obscure subdistichis. 

 Spathcs lignescentes mox glabratse aculeis paucis conico-acuminatis 

 armatas; exterior 7-pollicaris dorso obtuse bicarinata; interior 11- 

 poUicaris anguste fusiformis spadicem alte superans basi Integra et 

 pedunculum vaginans. 



Flares cujusque alveoli normaliter tres, fl. inferiore 9 , 2 superioribus J . 

 Fl. y : calyx (fructus) discifonnis cupiUarisve 3-4-5-fidus, lobis latis 

 apice trigonis; corolla duplo lonj^or profunda trifida, lobis subqua- 

 diatis apice triangularibus apiculatis, Brupce 65 x 5'lineares late 

 obovoideae rostellatge ; mesocarpiurn tenue sicciusculum ; e^idocar' 

 phtm tenue apice triporosum, 



2. D. MACBACANTHOS, Mart Palm, 8G. 



(Mi 



gulti 



82-), et ad fl. Negro amicus Wallace {PahnSy pL 27). 



Cum descriptione Martiana congruere videtur et a B, ripario differt 

 vaginis ocreisque vald^ acrdeatis nee inermibits j pinnis subovato- 

 lanceolatis longius acuminatis ; actdeis rhachis anticis rectis subcom- 

 presgis, posticis validis conico-acuminatis hamatis ; etc. 



Ko/r.s ^ adsunt, cujus descriptio sequitxu. CaZy.r minutus membrana- 

 ceus tiitidus, laciniis triangularibus subacuminatis. Corolla calyce 



