STANDLEY TREES AND SHRUBS OF MEXICO. 787 



flowers long-pedicellate; calyx and corolla minutely stellate-tomentulose out- 

 side ; bractlets 3, caducous ; petals nearly 2 cm. long, whitish ; capsule about 1.5 

 cm. long. " Jonote bianco" (Veracruz, Seler) ; " majagua " (Tabasco, Rovir 

 rosa). 



2. Hampea trilobata Standi., sp. nov. 



Yucatan and Campeche; type from Apazote, Campeche {Goldman 488; U. S. 

 Nat. Herb. no. 396850). 



Leaves 8 to 13 cm. long, 7 to 9.5 cm. wide, rounded or subcordate at base, 

 with 3 very short, triangular, acute or obtuse lobes near the apex, glabrate 

 above, minutely stellate-pubescent beneath ; calyx 5 mm. long, stellate-tomen- 

 tulose, the lobes ovate-oval, obtuse, nearly as long as the tube; bractlets 3; 

 capsule finely tomentose outside, glabrous within except along the sutures. 



The type specimen consists of a fruiting branch. A flowering specimen from 

 Izamal, YucatAn (Gaumcr 845) is probably conspecific, but it has more copious 

 and looser pubescence. The petals are about 13 mm. long. 



3. Hampea tomentosa (Presl) Standi. 



Thcspesia tomentosa Presl, Rel. Haenk. 2: 136. 1836. 



Oaxaca ; type from western Mexico. 



Leaves ovate to rounded-ovate, 8 to 20 cm. long, acute or acuminate, some- 

 times shallowly trilobate, stellate-pubescent on both surfaces, densely so 

 beneath, in age sometimes glabrate ; calyx lobes oval-ovate, obtuse, shorter than 

 the tube, the calyx with 3 large dark glands at base ; bractlets 3 to 6, caducous ; 

 petals white (?), about 1.5 cm. long. 



Specimens collected recently in Oaxaca by Conzatti and by Reko agree well 

 with Presl's description of Thespesia tomentosa, but they appear referable 

 rather to Hampea. Presl's species was based upon flowering specimens. 



2. QUAEARIBEA Aubl. PI. Guian. 691. 1775. 



Trees or shrubs ; leaves entire or nearly so, pinnate-nerved ; peduncles 1- 

 flowered, solitary opposite the leaves ; calyx tubular-obconic, 3 to 5-dentate ; 

 petals narrow, white ; stamen column elongate, antheriferous at the apex ; fruit 

 2-celled, hard, indehiscent, sometimes by abortion 1-celled. 



The dried plants have the odor of slippery elm {Ulmus fulva Michx. ). 



Leaves conspicuously barbate beneath in the axils of the veins 1. Q. funebris. 



Lea\-es not barbate beneath 2. Q. fieldii. 



1. Quararibea funebris (Llave) Standi. 

 Lexarza^ funebris Llave; Llave & Lex. Nov. Veg. Descr. 2: 12. 1825. 



^ Juan Jose Martinez de Lexarza was born at Valladolid (now Morelia) in 

 1785. At the age of 12 he became a student in the Colegio de Mineria in the 

 City of Mexico and later graduated with great distinction, his synodic being 

 no less a person than Humboldt. He was unable to continue his mineralogical 

 studies, and returned to MichoacSn, where he became a member of the provin- 

 cial militia and rose to the rank of first captain. He made the acquaintance of 

 La Llave, who was established at the Cathedral of Morelia, and that distin- 

 guished naturalist interested him in botany. In 1824-25 they published jointly 

 descriptions of a number of new genera of Mexican plants and various species 

 of orchids. Lexarza became an enthusiastic student of orchids, and devised a 

 special classification for them, based upon seed and pollen characters. He ex- 

 plored various regions of Mexico, and promised to become one of the accom- 

 plished botanists of his day, but his great industry proved his undoing and he 

 died in 1824. 



