480 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Inflorescence glabrous; standard about 7 mm. long; fruit glabrous. 



1. L. robinioides. 



Inflorescence densely brown-pilose with short appressed hairs; fruit densely 



pubescent 2. L. brunnescens. 



1. Lennea robinioides Klotzsch ; Link, Klotzsch & Otto, Icon. PI. Rar. 2: 65. 



pi. 26. 1842. 

 Veracruz ; described from cultivated plants. 



Slender glabrous shrub ; leaflets usually 9 or 11, oval, 2.5 to 4 cm. long, thin, 

 bright green ; flowers purplish, in very slender axillary racemes ; fruit linear. 



2. Lennea brunnescens Standi., sp. nov. 



Veracruz; type from Carrizal {Goldman 701; U. S. Nat. Herb. no. 397071). 



Tree, 6 to 7.5 meters high, the branches grayish or brownish, when young 

 densely pilose with short brownish ascending hairs ; stipules subulate, 2 to 3 

 mm. long ; leaf rachis 6 to 11 cm. long, the petiolules 1 to 2 mm. long ; leaflets 

 13 or 15, oval, oval-oblong, or oval-obovate, 2 to 5.5 cm. long, 1 to 2.5 cm. wide, 

 acutish to rounded at base, rounded or subretuse at apex, bright green and 

 glabrous on the upper surface, with prominulous reticulate venation, beneath 

 slightly paler, thinly sericeous with whitish or brownish hairs ; racemes rather 

 dense, 4 to 5 cm. long, the rachis and slender pedicels pilose with short brown 

 hairs ; calyx 3 mm. long, densely brown-pilose, the lower lobes triangular, 

 acuminate; petals glabrous, the standard 8 to 9 tnm. long; fruit flat, 5.5 to 7 

 cm. long, 1.2 to 1.4 cm. wide, obtuse at apex, gradually tapering to the base, 

 densely pilose with minute appressed brown hairs. 



Also collected at Baiios del Carrizal, Veracruz, August, 1914, by C. A. Purpus 

 (no. 6083). The Purpus collection is in fruit only and was distributed as 

 '' Acacia f" The only other Mexican species of the genus, L. robinioides, is 

 represented in the National Herbarium by a single collection {Purpus 5891), 

 from Misantla, Veracruz, which agrees well with the original description 

 and plate. L. robinioides differs from the present plant in its lack of 

 pubescence, less numerous leaflets, and smaller flowers. The flowers of 

 L. brunnescens appear to have been greenish yellow, although of course their 

 color may have changed in drying ; those of L. robinioides are purplish. 



24. COUPvSETIA DC. Ann. Sci. Nat. 4: 92. 1825. " 



Erect shrubs or trees, spiny or unarmed, pubescent ; leaves pinnate, the leaflets 

 small or large ; flowers in axillary racemes ; fruit linear, compressed, bivalvate. 

 In C. glandulosa as well as in other species the branches are often covered 

 with a transparent, yellowish or brown gum or lac produced by insects. 

 Palmer reports that in Sonora this is dissolved in water with sugar and used 

 as a drink in colds and fevers, and that it is believed also to be a remedy for 

 tuberculosis. It is sold in the drug shops as " goma Sonora " at about a 

 peso per pound. 



Inflorescence without glands or gland-tipped hairs. 



Leaflets 1.5 to 4 cm. long 1. C. polyphylla. 



Leaflets less than 1 cm. h>ng 2. C. axillaris. 



Inflorescence with numerous subsessile glands or gland-tipped hairs. 



Petioles flat and winged 3. C. planipetiolata. 



Petioles subterete, not winged. 



Rachis of the leaves pilose with long soft spreading hairs 4. C. mollis. 



Rachis of the leaves with short appressed hairs. 



Corolla about 1 cm. long 5. C. glandulosa. 



Corolla about 2 cm. long 6. C. madrensis. 



