256 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM. 



Shrub, the stems 2 meters long or more, scandent or recliuing, glabrous or 

 nearly so ; leaves ovate or lanceolate, 6 to 18 cm. long, acute ; flowers spicate, 

 in large panicles. "Pate" (Nicaragua); '* guaniquique " (Cuba); " pabellon 

 del rey " (Santo Domingo). 



This is probably the plant described by Sesse and Mociiio ^ as Celosia aloinicis. 



3. LAGREZIA Moq. in DC. Prodr. 13': 252. 1849. 

 1. Lagrezia monosperma (Rose) Standi. Jouru. Washington Acad. Sci. 5: 

 393. 1915. 

 Celosia monosperma Rose, Contr. U. S. Nat. Herb. 1: 352. 1895. 

 Colima and Guerrero; type from aianzanillo, Colima. 



Shrub, 2 to 5 meters high, glabrous or nearly so ; leaves ovate to lanceolate, 

 5 to 12 cm. long ; flowers perfect, small, in slender paniculate Sicilies. 



4. DICRAURUS Hook. f. in Benth. & Hook. Gen. PI. 3: 42. ISSO. 

 Erect shrubs, copiously pubescent ; leaves chiefly alternate, but some of them 

 frequently opposite ; flowers unisexual, small, spicate, the spikes paniculate. 

 Leaves ovate to ovate-lanceolate, acute, 3 to 9 mm. wide ; petioles 1 to 2 mm. 



long . J 1. D. leptocladus. 



Leaves rounded-ovate or rounded-deltoid, usually rounded at the apex, 13 to 35 

 mm. wide ; petioles 5 to 10 mm. long 2. D. alternifolius. 



1. Dicraurus leptocladus Hook. f. in Benth. & Hook. Gen. PI. 3: 43. 1880. 

 Dicraurus diffusus Baill. Hist. PI. 9: 214. 1888. 



Chihuahua to San Luis Potosi. Western Texas (type locality). 

 Shrub, 0.2 to 1 meter high, with numerous stems. 



2. Dicraurus alternifolius (S. Wats.) Uline & Bray, Bot. Gaz. 21:355. 1896. 

 Ircsine alterniiolia S. Wats. Proc. Amer. Acad. 24:72. 1889. 

 Shrub, 1 to 3.5 metere high, with grayish or brownish branches. 



5. PFAFFIA Mart. Nov. Gen. & Sp. 2: 20. 1826. 

 1. Pfaffia hookeriana (Hemsl.) Greenm. Field Mus. Bot. 2:330. 1912. 



Hebanthe hookeriana Hemsl. Biol. Centr. Amer. Bot. 3: 19. 1882. 



Veracruz, the type from Cordoba. Central America. 



Scandent shrub, more or less pubescent ; leaves ovate, acute, short-petiolate ; 

 flowers mostly perfect, yellowish white, spicate, the sepals covered with long 

 white hairs. 



6. IRESINE P. Br. Civ. Nat. Hist. Jam. 358. 1756. 

 Shrubs or small trees, erect or sometimes scandent ; leaves opposite, petiolate ; 

 flowers perfect or unisexual, usually spicate, the sepals variously hairy. 



A number of herbaceous species occur in Mexico. A plant described by Sess6 

 and Mocino ^ as Celosia dioiea belong, apparently, to this genus, but its identifi- 

 cation is doubtful. 

 Flowers perfect or polygamous. 



Branches of the inflorescence glabrous or nearly so. 

 Bracts and bractlets rounded or obtuse at the apex. 



Inflorescence nake<l ; l)racts stramineous or whitish ; pubescence of the 



sepals bright white; leaf blades broadest at the middle__l. I. nigra. 



Inflorescence leafy; Iiracts fuscous; pubescence of the sepals brownish; 



leaf blades broadest near the base 2. I. pacifica. 



' PI. Nov. Hisp. 41, 1887. The specific name is written "Alomiris " in Fl. 

 Mex. 74. 1894. 



' PI. Nov. Hisp. 38. 1893. 



