NATURAL SCIENCES OP PHILADELPHIA. 453 



Nov. Gen. Cesalpin;e. 



Hoopesia. Calyx ebracteatus, profunde quinquefidus vel quinquepartitus ; 

 laciniis lanceolatis, subinrequalibus, lineari-acutis, corolla petallis 5 subpapi- 

 lionaceis, longe unguiculatis ; staminis 10 libera, filarneruis ad basi lanuginosis, 

 ovarium stipalum pluriovulatum ; stylus basi dilitatus, filiforinis, filamentis 

 parum longior; stigma parva, legumeu louge stipatum, lato-lanceolatum puree 

 compressum, obtusum, 8 10 spermis, tardi dehisceas, semen reniformis. 



Hoopesia arborea. Arbor, ramis spinosis, foliis bipinatis, 1 3-jugis, foli- 

 olis oppositis, obovatis obtusis, 3 6-jugis, floribus axillaribus, subsolitariis, 

 breviter pedunculatis. 



Near Corpus Cbristi. May. 



Tree 2025 feet high and 8 12 inches in diameter ; bark of trunk and 

 branches smooth, and of a pale green ; branches numerous, forming a dense 

 shade; legume 4 inches long, 10 lines wide and 8 lines thick. Seeds large, 

 divided by septa; spines axillary, double, stipular, subulate and small; flowers 

 yellow, with reddish-brown lines near the base of the limb of the petals. In- 

 sects have destroyed the embryo in our fruiting specimens. 



Dedicated to Joshua Hoopes, of Westchester, Pennsylvania, a zealous botanist, 

 who has long studied and admired trees.) 



Acacia S ab eau a, s. nov. Fruticosa; ramis teretibus, juoioribusque peti- 

 olis glanduloso-pubescentibus; foliis bipinuatis, pinans 2 4-jugU, pinnulis 

 4 6-jugis, ovatisve rhorubo-ovatis, submucronatis, utrinqae glabris ; stipulis 

 ovatis, longe acuminatis; floribus magnis, longe-pedunculatis, monocephalis, 

 erectis, capitulis multifloris, filamentis longe exsertis, legumine immature lato 

 lineari tomentose, falcata acuminata, longe stipata. 



Banks of the S:tn Saba River. June. 



Shrub 6 10 feet high, branching from near the ground. Leaves, including 

 the petiole, 4 5 inches long, leaflets inequilateral and of an inch long and 

 J an inch wide ; flowers numerous, bright yellow, in solitary heads on pedun- 

 cles 2 3 inches long; heads round, an inch in diameter. 



Acacia D u r a n d i a n a, s. nov. Fruticosa, glabriusculis alternatis recurvis ; 

 pinnis 2 3-jugis; foliolis 3 4-jugis, obovatis mucronatis, spicis elongatis, 

 multifloris, foliolis multo iongioribus, floribus brevissime pedicellatis, legumine 

 glabro, lato-lineari obtusove acuto margine andulato. 



Near Fort Belknap. 



Shrub 3 4 feet high, diffusely branched from the base, and armed with 

 rather slender, recurved prickles. Flowers yellow and numerous, spikes 2 3 

 inches long. Leaflets 2 3 lines long, inequilateral and mueronate, subglandular 

 and slightly pubescent; pod 2 3 inches long and of unequal widih, from \ 

 of an inch, the apex often rounded or retuse and rarely acute. 



Acacia Nueciana, s. nov. Fruticosa; ramis junioribus, foliisque et spicis 

 glanduloso-pubescentibus; foliis 3 5-jugis foliolis 7 10-jugis, lineari-lanceo- 

 latis inequilateralis acutis, breviter petiolatis spinis stipularibus rectis parvis 

 subulatis ; pedunculis solitariis elongatis, floribus capitatis 10 14-meris, calycis 

 campanulatis breviter dentatis, petalis calyce triplo Iongioribus acutis. 



Near the Nueces River. 



Shrub 4 6 feet high, the stipular prickles 2 3 lines long, and in divergent 

 piirs; flowering peduncles 1 \.\ in. long; florets capitate shortly pedicellate, 

 corolla \ of an inch long; filaments long, exserted ; heads of flowers f of an 

 inch in diameter; leaves 2 3 inches long; leaflets 3 4 lines in length and 2 

 lines wide. 



Mimosa calcarea, s. nov. Humilis, fruticosa; 8 12 policaris, valde ar- 

 matis ; spinis rectis duplis longissimis, pinnis unijugis; foliolis 6 10-jugis, 



1861.] 



