388 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



22. Calliandra tetragona (Willd.) Benth. in Hook. Journ. Bot. 2: 139. 1840, 

 Acacia tetragona Willd. Sp. PI. 4: 1069. 1806. 



Michoac3-n to Chiapas. Central America and northern South America ; type 

 from Caracas. 



Shrub or small tree. 1.5 to 4.5 meters high; leaflets numerous, 4 to 10 mm. 

 long, bright green ; flowers white ; fruit about 1 cm. wide. 



23. Calliandra oaxacana Rose, Contr. U. S. Nat. Herb. 5: 193. 1899. 

 Zacatecas to Oaxaca ; type from Tomellln Canyon, Oaxaca, 



Shrub 1 to 1.5 meters high ; leaflets numerous, 4 to 11 mm. long ; flowers 

 white or pink. 



24. Calliandra formosa (Kunth) Benth. Lond. Journ. Bot. 3: 98. 1844. 

 Acacia formosa Kunth, Mimos. PI. Legum. 102. pi. 32. 1819-24. 

 Acacia gracilis Mart. & Gal. Bull. Acad. Brux. 10'': 311. 1843. 

 Calliandra coulteri S. Wats. Proo. Amer. Acad. 17: 352. 1882. 



Baja California to Chihuahua, Colima, and YucatSn. 



Shrub or small tree, nearly glabrous ; leaflets 0.5 to 2.5 cm. long, bright green ; 

 flowers white. " Tepeguaje " (Guanajuato). 



C. coulteri may be distinct, but probably is not. The name " 6bano " is re- 

 ported as applied to this species, but the writer is doubtful whether the plant 

 so referred to (said to be a large tree) is correctly identified. 



25. Calliandra portoricensis (Jacq.) Benth. Lond. Journ. Bot. 3: 99. 1844. 

 Mimosa portoricensis Jacq. Icon. PI. Bar. 3: 20. pi. 633. 1793. 



Sinaloa to San Luis Potosi, YucatJin, and Oaxaca. AVidely distributed in 

 tropical America ; type from Porto Rico. 



Shrub or small tree, 1 to 4.5 meters high, nearly glabrous ; leaflets 1.8 cm. 

 long or shorter, thin, bright green ; flowers pink or white ; fruit about 8 mm. 

 wide, glabrous. " Pich " (Yucatan, Maya); " moruro de costa," " soplillo " 

 (Cuba); " cojobillo," "acacia," "zarza boba " (Porto Rico); "granolino" 

 (Santo Domingo). 



26. Calliandra capillata Benth. Lond. Journ. Bot. 3: 98. 1844. 



Guerrero and Puebla to Chiapas ; type from Mount San Felipe, Oaxaca. Re- 

 ported from Guatemala. 



Shrub, 1 to 2.5 meters high, glabrous; leaflets few, 1.2 to 4 cm. long, thin, 

 bright green ; flowers white or pink. 



DOUBTFUL SPECIES. 



Calliandra hiksuta (Don) Benth. Trans. Linn. Soc. Bot. 30: 554. 1875. 

 Inga hirsuta Don, Hist. Dichl. PI. 2: 395. 1832. Believed to have come from 

 Mexico. 



Calliandra LAMBEETiANA (Don) Benth. Lond. Journ. Bot. 3: 100. 1844. Acacia 

 lambertiana. Don in Lindl. Bot. Reg. 9: pi. 121. 1823. Described from culti- 

 vated plants said to have come from Mexico. Perhaps the same as C. laxa. 



Calliandra tetraphylla (Don) Benth. Trans. Linn. Soc. Bot. 30: 544. 1875. 

 Inga tetraphylla Don, Hist. Dichl. PI. 2: 392. 1832. Described from Mexico. 



Calliandra fulgens Hook. f. in Curtis's Bot. Mag. 124: pi. 7626. 1898. De- 

 scribed from cultivated plants believed to have come from Mexico. Apparently 

 related to C. emarginata, but with more numerous (6) leaflets. 



11. LYSILOMA Benth. Lond. Journ. Bot. 3: 82. 1844. 

 Unarmed trees or shrubs ; leaves bipinnate, with few and large or usually 

 numerous and small leaflets ; flowers small, capitate or spicate ; fruit flat, broad, 

 the valves thin, separating from the persistent margin. 



