166 



Turnera pringlei Rose, sp. now 



Low, bushy shrub, 15 to 50 cm. high; young branches, leaves, calyx, etc., densely 

 and softly silky pubescent; leaves oblong to obovate, 12 to 40 mm. long, obtuse, 

 tapering at base into a short petiole, serrate, more or less rugose; flowers solitary 

 in the axils, sessile; bracts 2, linear, pubescent, 4 mm. long, not glandular; calyx 

 6 mm, long, the lobes twice as long as the tube, ovate, acuminate, pubescent without ; 

 petals yellow, obovate, 6 mm, long; filaments free to the base, glabrous; styles 2, 

 glabrous; capsule 3 mm. long, somewhat hairy; seeds obovate, twice as long as" 

 broad, less than 2 mm. long. 



Collected by Mr. C. G. Pringle near Tehuacan, in eastern Puebla, 1897 (No. 6692). 

 1'erhaps here may be referred specimens collected by Mr. E. W. Nelson near San 

 Geronimo and La Venta, State of Oaxaca, altitude 200 feet, .Inly 13, 1895 (No. 2780), 

 and by J.N. Rose near San Juan Capistrano, August 18, 1807 (No. 3530). 

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



Collected by Mr. C.G. Pringle on sand dunes, Tampico, State of Tamaulipas, 1808 

 (No. 6821). 



Turnera ulmifolia alba (Liebm.) Rose. Turnera alba Liebm. Ann. Sci. Nat. ser. 3, 

 9:318. 1848. Turnera ulmifolia veluiina subvar. 2, Urb. Jahrb. des Kgl. Hot. 

 (iart. Mus. Berl. 2 : 141. 1883. 



Stems 3 to 6 dm. high. Collected by Mr. C. G. Pringle in Toruellin Canyon, State 

 of Oaxaca, 1897 (No.67L9); by Mr. E. W. Nelson between Niltepec and Zacatepec, 

 State of Oaxaca, altitude 400 feet, July 15, 18i>5 (Nos. 2810, 2807); also vicinity of 

 Cuicatlan, State of Oaxaca, altitude 1,800 to 2,500 feet, October 8 to 16, 1891 (No. 

 1659), and vicinity of San Juan Guichicovi, State of Oaxaca, altitude 450 to 1,500 

 feet, June 11 to 24, 1895 (No. 2714). 



1 have followed Mr. Urban in keeping this white-flowered Turnera under the 

 species ulmifolia. It does not belong, however, with his variety velutina. The latter 

 is certainly a good species, and 1 have so considered it in my treatment below. 



The type locality is stated to be "ad ripas Rio do las Vucltas," which is probably 

 near Mr. Priugle's locality. 



Turnera ulmifolia surinamensis Urb. Jahrb. <lea Kgl. Bot. Cart. Mus. Berl. 2:113, 

 1883. 



Collected by Mr. E. W. Nelson in Santa Eligenia, State of ( >axaca, Mexico, altitude 

 500 feet, July 18, 1895 (Xo. 2819a); also between Niltepec and Zacatepec, State of 

 Oaxaca, Mexico, altitude 400 feet, July 15, 1895 (No. 2816). 



It is questionable whether our Mexican form should not be separated specilically 

 from T. ulmifolia. 



Turnera ulmifolia caerulea (DC.) Urb. Jahrb. des Kgl. Bot. Gait. Mus. Berl. 2 : 144. 

 1883. Turnera caerulea DC. Prodr. 3 : 346. 1828. 

 Collected by J. N. Rose near Colomas, July 16, 1897 (No. 1692), and between Agua- 

 cota and Dolores, Tepic, August 6, 1897 (No. 3357). 



Turnera humifusa (ProsI) Endl. in Walp. Rep. 2: 230. 1843. liohadschia humifusa 

 Presl, Reliq. Haenk. 2:98. 1830. /'. aphrodiniaca Ward, Virg. Med. Month. 

 April, 1876:49. 1876. T. diffusa aphrodisiaca Urb. Jahrb. des Kgl. Bot. Gait. 

 Mus. Berl. 2 : 127. 1883. 



Collected by Dr. E. Palmer, near Acapulco, October, 1894, to March, 1895 (No. 133), 

 and J. N. Rose, between Rosario and Colomas, Sinaloa, July 12, 1897 (No. 1612). • 



This must be the Bohadsohia humifusa of Presl, which was originally collected at 

 Acapulco. Dr. Palmer's plant agrees exactly with the description, except that the? 

 flowers are said to be rose-colored. 



lam inclined to think that this Mexican form, which Dr. Urban considered as a 

 variety of 7. diffusa, deserves specific rank. It differs from the West Indies speci- 

 mens in its pubescence and in its larger, thinner, and more glabrous leaves. Before 



