356 safford: new bull-horn acacias 



crater-like nectar gland on the petiole a little below the first pair of 

 pinnae, often a second, tubular gland below the second pair, and some- 

 times a gland at the base of the terminal and subterminal pairs of pin- 

 nae; leaflets 22 to 26 pairs, assuming a reddish bronze color when dry, 

 oblong-linear, 8 to 10 mm. long, 2 mm. broad, unequal at the base, 

 rounded at the apex and mucronulate, those from which apical food 

 bodies have fallen retuse; midrib prominent beneath, obhque; lateral 

 nerves inconspicuous. Leaves of the flowering branchlets composed 

 of 2 to 5 pairs of pinnae; leaflets 8 to 14 pairs, 3 to 4 mm. long; rachis 

 of leaf with a conspicuous raised nectar gland just below the lower- 

 most pair of pinnae, and frequently a smaller gland at the base of the 

 terminal pair of pinnae. Flowers in ovate-oblong heads or spikes 11 

 to 15 mm. in length and 8 mm. in diameter at anthesis, usually in clus- 

 ters of 2 or 3, rarely solitary or in clusters of 4; peduncles graduated 

 in length, thick and fleshy, dark reddish brown, the longest equal in 

 length to the fusiform axis of the head or exceeding it, the shortest 

 less than half as long; involucel 4-toothed, calyx-like, situated at or 

 near the base of the peduncle, puberulent without. Flowers ferrugine- 

 ous, tubular; calyx 1.9 to 2.1 mm. long, 0.5 to 0.6 mm. in diameter, 

 densely puberulent about the margin, obtusely and shallowly 5- or 

 6-lobed; corolla scarcely exceeding the calyx; stamens numerous, with 

 ferrugineous filaments and pale tan-coloi;ed anthers; pistil filiform. 

 Pedicelled bracteoles between the flowers with obtuse ovate ciliate 

 laminae, these' puberulent on the upper surface; pedicels 1.4 mm. 

 long, when young clothed with sparse short diaphanous hairs, at length 

 glabra^te. Pods resembling those of other Ceratophysae, inflated, 

 indehiscent, thin-chartaceous, 3.5 to 4 cm. long, 1 cm. in diameter, 

 wine-colored when mature, cylindrical, often slightly oblique, termin- 

 ating in a sharp spine-like beak, and contracted at the base into a 

 short stipe-like neck. 



Type in the herbarium of the Field Museum of Natural History, 

 no. 189552, including flowers and mature seed-pods, collected along 

 the shore north of the city of Vera Cruz, Mexico, January 24, 1906, 

 by Dr. J. M. Greenman (no. 87). A specimen of the type collection 

 with less perfectly developed spines and without seed-pods, is in the 

 United States National Herbarium, no. 692164. 



Acacia chiapensis Safford, sp. nov. Group Globuliferae, section 

 Ramulosae. An erect shrub or small tree 3 to 5 meters high, resem- 

 bling Acacia Donnelliana but distinguished from that species by the 

 absence of interpinnal nectar glands on the larger leaves and by the 

 more numerous glands at the base of the leaf rachis (petiole) . Young 

 growth puberulous. Flower heads globose, borne in axillary clusters 

 on special flowering branches (only very young flower heads observed 

 in the type specimen), covered before anthesis by the imbricate pel- 

 tate limbs of the pedicelled interfloral bracteoles. Fruit (immature 

 in the type materfal) a flat strap-shaped legume, somewhat thickened 

 at the sutures, 7.5 to 7.8 cm. long, 7 to 8 mm. broad, terminating in 



