

68 Muhlenbergia, Volume 5 



Thyella 

 Thyella macrocephala (Brandegee) 



Jacquemontia macrocephala Brandegee, Zoe 5: 219. 1905. 



Mexico: Sinaloa; near Cerro Colorado. Type collected by 

 Brandegee. 



Operculina 

 Operculina discoidesperma (J. Donnell Smith) 



Ipomoea discoidesperma J. Donnell Smith, Bot. Gaz. 14: 



27. 1889. 

 Type from Pansamala, Guatemala, altitude 3800 feet. 

 Mexico: Chiapas; along road between Teneapa and Yaja- 

 lon, 3000-5000 feet altitude, E. IV. Nelson 3262, October 13, 

 1895 ( Nat - Herb.); Guanajuato, A. Duges, 1894 (Gray Herb.). 



Operculina aurea (Kellogg) 



Aneisia aurea Kellogg; Froc. Cal. Acad. 5: 83. 1873. 



Ipoinoea aurea Kellogg; Curran, Bull. Cal. Acad. 1: 143. 

 1885. 



Lower California: San Jose del Cabo, Brandegee jp2, 

 October 17, 1899, September 29, 1890 (Gray herb.); Cape St. 

 Lucas, Xantus 81, 1859-60 (Gray herb.). 



Operculina lancifolia sp. now 



Related to O. rubicunda House {Ipomoea alata Rose, not 

 R. Br.). Stems slender, glabrous: leaf-blades linear-lanceolate, 

 acuminate and cuspidate at the apex, the base cordate-sagittate, 

 5 to 7 cm. long, 4 to <Smm. wide, the basal auricles 4 to 7 nun. 

 long, obtuse; petioles 1 to 2 cm. long: peduncles 3 to 4 cm. long, 

 1 -flowered: pedicels 3 to 4 cm. long, slightly thickened: calyx 

 7 to 10 mm. thick, yellowish or greenish: corolla rose-colored, 

 5 cm. long, snbsalverform, the 5-lobed limb about 3 cm. broad: 

 stamens included. 



MEXICO: Chiapas; Valley of Jiquipilas, 2200-2X00 feet alti- 

 tude, E. IV. Nelson 2Q2J X i <s 95- Type, sheet no. 233,346 in the 

 National Herbarium. 



