STANDLEY— TREES AND SHRUBS OF MEXICO. 427 



11 cm. long, 2 cm. wide, velvety-puberulent. " Hojasen," " hojas6n del pals," 

 "sen," "sen del pais," " yagati," " guete-regl " (Oaxaca, Seler). 

 24. Caesalpinia yTicatanensis Greenni. Field Mus. Bot. 2: 252. 1907. 



Veracruz and Yucatan ; type from Izamal, Yucatjin. 



Shrub or tree; leaflets oblong to oval, 1.5 to 3.5 cm. long; flowers yellow, 

 large and showy ; fruit about 6.5 cm. long and 1.8 cm. wide, velvety-pubescent. 

 " Xkanpocolcum " ( Yucatan ) . 



Doubtfully distinct from C. exostemma. 



DOUBTFUL SPECIES. 



RoBiNiA PYRAMiDATA Mill. Gard. Diet. ed. 8. Robhiia no. 7. 1708. Type from 

 Campeche. 



11. DELONIX Raf. Fl. Tellur. 2: 92. 1836. 

 1. Delonix regia (Boj.) Raf. Fl. Tellur. 2:92. 1836. 



Foinciana regia Boj. ; Hook, in Curtis's Bot. Mag. pi. 2S8Jf. 1829. 



Widely cultivated in Mexico as a shade tree and sometimes growing without 

 cultivation. Native of Madagascar and tropical Africa, but planted conuiionly 

 in all tropical regions. 



Large tree, usually 10 to 20 meters high, with wide-spreading crown, the trunk 

 sometimes a mett r in diameter ; bark thin, grayish brown, slightly furrowed ; 

 leaves bipinnate, deciduous, the leaflets numerous, oblong, 4 to 10 mm. long, 

 pubescent ; flowers racemose-corymbose, the petals 5 to 7 cm. long, orange-red 

 or scarlet ; fruit dark brown, flattened, often 60 cm. long ; wood whitish or yel- 

 lowish, close-grained but soft and weak, its specific gravity about 0.83. " Tabu- 

 chin " or " tabachin " (Oaxaca, Sinaloa) ; " framboyan " or " frambayano " 

 (Veracruz; a corruption of the French " flamboyant") ; " espuela de caballero," 

 " flor del camaron " (Oaxaca, Reko) ; " arbol del fuego " (various parts of Mex- 

 ico, Guam, Philippines); " pata le6n " (Tamaulipas) ; "caballero" (Philip- 

 pines). 



The English names are " flame-tree," " royal poinciana," and " peacock-flower." 

 This is one of the most widely planted trees in the tropics, and when covered 

 with its huge bunches of brilliant flowers it is extremely showy. When leafless 

 the trees are rather unsightly, and their wood is so weak that they are often 

 broken by wind. For an illustration of the tree see Contr. U. S. Nat. Herb. 

 8: pi 54. 



12. CONZATTIA Rose, Contr. U. S. Nat. Herb. 12: 407. 1909. 



Shrubs or small trees, unarmed ; leaves bipinnate, with numerous small leaf- 

 lets; flowers showy, bright yellow, in long slender axillary racemes; fruit flat, 

 few-seeded, very acute at both ends, narrowly winged along the edges. 



The genus was named in honor of Dr. C. Conzatti, of Oaxaca, a botanist well 

 known for his extensive collections and publications upon the Mexican flora. 



Leaflets glabrous on the upper surface 1. C. multiflora. 



Leaflets sericeous on the upper surface 2. C. sericea. 



1. Conzattia niultifl.ora (Robinson) Standi. 



Caesalpinia multiflora Robinson, Proc. Amer. Acad. 27: 167. 1892. 



Conzattia arhorea Rose, Contr. U. S. Nat. Herb. 12: 408. 1909. 



Michoaciln to Puebla and Oaxaca ; type from Monte Leon Pass, MichoacAn. 



Large shrub or small tree, nearly glabrous, 3 to 8 meters high, with broad 

 spreading crown, the trunk 10 to 30 cm. in diameter ; leaves large, with numerous 

 small leaflets, these oblong. 1 to 1.8 cm. long, obtuse; flowers showy, yellow, in 

 slender racemes ; fruit 8 to 15 cm. long, 1 to 1.5 em. wide, flat, very acute, with 

 3 or 4 seeds. 



