EOSE AND STANDLEY — GENUS TALINUM IN MEXICO. 287 



attenuate, about 8 mm. long; petals pink, 9 or 10 mm. long; stamenB about 20; pedicels 

 about 1 cm. long, thick and fleshy, narrowly clavate. 



The pink flowers of this plant might lead one to place it with T. crassicaule il it were 

 not for its very narrow sepals and low stature. It has narrower sepals than any other 

 member of this group. 



Type U. S. National Herbarium no. 300431, collected at Rosario, Sinaloa, July 10, 

 1897, /. N. Rose 1585. 



14. Talinum confusum sp. now 



An erect perennial, branched from near the base, with thick, fleshy roots; stems stout, 

 somewhat suffrutescent below; leaves broadly oblanceolate, retuse, cuneate at the base, 

 about 5 cm. long; inflorescence racemose; pedicels clavate, about 1 cm. long; sepals 

 8 mm. long, ovate or oblong, with long-acuminate tips; petals pink; capsule shorter 

 than the sepals, subspherical, obtusely triquetrous; bracts of the inflorescence 3 or 4 

 mm. long, linear. 



The specimens included here have been distributed as T. triangularc, T. crassicaule, 

 and T. racemosum, but they seem to be different from all those species. Ours is a 

 lower plant with longer sepals than T. crassicaule, and it differs from T. triangulare in 

 its pink flowers and narrower leaves. 



Type U. S. National Herbarium no. 316680, collected in Tomellin Canon, Oaxaca, 

 July 6, 1897, C. G. Pringle 6738; altitude about 900 meters. 



Other specimens examined: 



Oaxaca: Between La Venta and Niltepec, altitude 60 meters, July 14, 1895, E. 

 W. Nelson 2799; about Logunes, altitude 255 meters, June 5, 1895, Nelson 2642. 



15. Talinum triangulare Willd. Sp. PL 2: 862. 1799. 

 Type locality, "In America ad maris littora. " 



Tall, usually almost one meter high; stems thick and fleshy, rather abundantly 

 branched ; leaves obovate, 4 to 9 cm. long, rounded at the apex and sometimes obscurely 

 emarginate, narrowed at the base; inflorescence consisting of a few short, branched, 

 axillary peduncles; flowers on pedicels 1 cm. long; sepals 5 mm. long, broadly lanceo- 

 late, acuminate; petals white, 12 mm. long; capsule subspherical, surpassing the sepals; 

 seeds black, finely papillate. 



One Mexican specimen, collected in Yucatan by G. F. Gaumer (no. 733) seems to 

 belong here. The species appears to be not uncommon in the West Indies and in 

 South America. 



16. Talinum diffusumsp. now Plate 45. 

 Perennial, about 15 cm. high, diffusely branched; stems stout and fleshy, becoming 



almost woody below; leaves oblanceolate-cuneiform, retuse and mucronate, very 

 thick and fleshy, dark green; flowers in terminal simple or rarely branched racemes, 

 their pedicels subtended by minute lanceolate bracts, the pedicels 1 cm. long or less, 

 obtusely triangular and clavate; of the two sepals one oblong and emarginate with a 

 stout mucro between the apical lobes, the other ovate or lanceolate and acuminate; 

 petals white; flowers about 18 mm. in diameter; petals ovate, acute, or acuminate; 

 stamens about 20; capsule obscurely triquetrous; seed very dark brown or black. 



Type U. S. National Herbarium no. 572643, collected at Victoria, Tamaulipas, in 

 1907, Dr. Edward Palmer 415. Living plants sent to Washington, flowered during 

 May and June of 1909. A photograph of one of these is reproduced here. The low 

 diffuse habit of the plant, the short stout stems, narrow and small leaves, and peculiar 

 sepals separate it from the other members of the group. 



Explanation of Plate 4.">.— From a specimen grown at Washington, scat from Victoria, Tamaulipas, 

 La 1907, by Dr. Edward Palmer. 



