286 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 



10. Talinum cymbosepalum sp. now 



A low perennial, 15 cm. high or less, from a thick, tuberous root; stems branched 

 near the base, otherwise simple, stout, fleshy; leaves broadly linear, acute, flat, 

 15 to 40 mm. long; flowers axillary but all crowded at the ends of the stems, on very 

 stout and thick pedicels, these 5 to 12 mm. long, flatfish, bracteate at or below the 

 middle or ebracteate; sepals ovate, acuminate, strongly concave, 9 or 10 mm. long, 

 conspicuously nerved; petals about 16 mm. long, apparently reddish; capsule 8 mm. 

 long, ovoid. 



Type U. S. National Herbarium no. 840776, collected at Los Naranjos, Oaxaea, 

 May, 1908, C. A. Purpus 3091. This collection was distributed as T. lincare, but 

 the plants have much larger flowers, apparently of a different color, and broader 

 leaves, and have the flowers clustered at the ends of the branches. Talinum cymbost- 

 palum is from a locality far to the south of the area in which T. lineare is known to 

 occur. 



11. Talinum lineare II. B. K. Nov. Gen. & Sp. 6: 77. 1823. 



Type locality, "Locis aridis, inter Mexico et Real de Pachuca, prope Gasave, in 

 valle Tenochtitlanensi, alt. 1230 hex. ", in Ihe State of Hidalgo. 



A low perennial, usually less than 15 cm. high, from a thick, fleshy root, branched 

 from the base but the branches simple, stout, and fleshy; leaves 12 to 22 mm. long, 

 linear, thick and fleshy, acute, narrowed at the base; peduncles solitary in the axils of 

 the leaves, bearing one or two flowers, these on pedicels 1 cm. long; pedicels bracteate 

 at or above the middle; petals bright yellow, about 1 cm. long; sepals 5 or 6 mm. long, 

 unequal, ovate, acute or one of the two sometimes obtuse; capsules 6 mm. long, sub- 

 spherical, obtusely triquetrous; seeds subspherical, black, rugulose. 

 Specime?is examined: 



Hidalgo: Near Tula, 1905, Rose, Painter <£• Rose 8298. 



Federal District; Near Guadalupe, Valley of Mexico, 1903, Rose & Painter 

 8057; near Tlalnepantla, 1905, Rose, Painter & RoseM2'r, Cerro de Guadalupe, 

 August 18, 1896, ./. W. Harshberger 106. 



12. Talinum aurantiacum Engelm. Bost. Journ. Nat. Hist. 6: 153. 1850. 



Typo locality, "On the Sabinas and more abundantly on the Llano, rare about New 

 Braunfels, on rocky soil or almost naked rocks, " Texas; type collected by Lindheimer. 



Fifteen to 50 cm. high, from a fleshy root, branched from the base, the branches usu- 

 ally again much branched, erect, stout; leaves flat, linear or linear-elliptical, acute, 

 narrowed at the base, 15 to 45 mm. long; inflorescence axillary, the peduncles usually 

 simple and 1 -flowered, bracteate near the base or at least below the middle, 13 to 20 

 mm. long, slender, somewhat thickened toward the base of the flower, reflexed in fruit; 

 sepals about 6 mm. long, ovate, acuminate, conspicuously nerved ; capsule 7 mm. long, 

 subspherical, obscurely triquetrous; seeds black, rugulose. 



By some T. aurantiacum has been considered the same as T. lineare, but it can be 

 distinguished from that species by its larger size, branched stems, usually broader 

 leaves, and differently bracteate pedicels. This species is common in the south- 

 western United States, while T. lineare is not found outside of Mexico. 

 Specimens exam ined: 



Chihuahua: Santa Eulalia Plains, August 18, 1885, Wilkinson; near Lake Santa 



Maria, 1899, E. W, Nelson C402. 

 San Luis Potc-si: Region of San Luis Potosf, 1878, Parry <fc Palmer 68. 



13. Talinum attenuatum sp. nov. 



A low, somewhat suffrutescent, branched perennial; leaves oblanceolate, obtuse, not 

 retuse, mucronate, euneate at the base; flowers few, in terminal simple racemes, each 

 pedicel subtended by a linear, attenuate bract 4 mm. long; sepals lanceolate, long- 



