STANDLEY TREES AND SHRUBS OF MEXICO. 847 



It seems remarkable that there should be no earlier name for a plant of so 



wide distribution, but the writer has been unable to find one. This species 



differs in several respects from the other American representatives of the 

 jfenus and may belong to a distinct genus. 



DOUBTFUL GENERA. 

 AzARA UMBELLATA Presl, Rel. Haenk. 2: 92. 1836. Type from the west coast 

 of Mexico. The plant is probably not of this genus, but the writer has been un- 

 able to place it among any of the Flacourtiaceae represented in recent Mexican 

 collections. 



112. TURNERACEAE. Turnera Family. 

 Reference: Urban, Jahrb. Bot. Gart. Berlin 2: 1-152. 1883. 

 Herbs, shrubs, or trees ; leaves alternate, petiolate, simple, toothed, often 

 biglandular at base ; stipules small or none ; flow ers axillary, solitary or fascicu- 

 late, often bibracteolate, perfect ; calyx 5-lobate, deciduous, the lobes imbricate ; 

 petals 5, inserted in the throat of the calyx tube ; stamens 5, inserted on the 

 calyx tube, the filaments free ; styles 3 ; fruit a 1-celled 3-valvate capsule, many- 

 seeded. 



The genus Piriqueta is represented in Mexico by one herbaceous species. 

 Calyx lobes nearly free ; flowers about 8 cm. long ; petals appendaged. 



1. ERBLICHIA. 



Calyx lobes united for about half their length ; flowers less than 3 cm. long ; 



petals not appendaged 2. TURNERA. 



1. ERBLICHIA Seem. Bot. Voy. Herald 130. 1854. 

 1. Erblichia odorata Seem. Bot. Voy. Herald 130. 1854. 



Piriqueta odorata Urban, Jahrb. Bot. Gart. Berlin 2: 80. 1883. 



Oaxaca and Chiapas ; reported from Tabasco. Also in Panama, the type 

 locality. 



Tree, 7 to 15 meters high ; leaves lanceolate, oblong-lanceolate, or oblong- 

 elliptic, 6 to 13 cm. long, acute or acuminate, crenate, glabrous above, fulvous- 

 pilosulous or glabrate beneath ; flowers long-pedicellate ; sepals linear-lanceo- 

 late, subulate-tipped, pilosulous, with thin petaloid margins ; petals yellow, 

 about 8 cm. long and 4 cm. wide; capsule 4 cm. long, oblong-ellipsoid, densely 

 fulvous-pilose, the valves very thick (2.5 to 3 cm.) and woody. " Sanjuanero " 

 (Tabasco, Ramirez); " jarro de oi-o " (Oaxaca); " azuche " (Oaxaca; from 

 the Nahuatl a-xochitl, "water-flower," or "flower like a water-jar," Reko). 



When in flower this must be a remarkably showy and handsome tree. 



2. TURNERA L. Sp. PI. 271. 1753. 



Herbs or small shrubs ; leaves serrate, often biglandular at base ; flowers 

 axillary, usually solitary, yellow, white, or pink, tlie peduncle often adnate to 

 the petiole ; calyx tubular or campanulate, with 5 narrow lobes ; petals obovate 

 or spatulate, short-clawed, thin ; fruit, a thin-walled capsule ; seeds with a sub- 

 membranaceous aril. 



Besides the species listed below, two or three herbaceous ones occur in 

 Mexico. 

 Flowers pedicellate, the pedicel adnate to the petiole; petiole with 2 large 



glands 1. T. ulmifolia. 



Flowers sessile; petiole without glands 2. T. diffusa. 



1. Turnera ulmifolia L. Sp. PI. 271. 1753. 



Turnera unguatifolia Mill. Gard. Diet. ed. 8. Turnera no. 2. 1768. 



Turnera trioniflora Sims in Curtis's Bot. Mag. pi. 2106. 1820. 



Turnera mollis H. B. K. Nov. Gen. & Sp. 6: 126. 1823. 



Turnera caerulea DC. Prodr. 3: 346. 1828. 



