i arborescens Schltdl., Linnaea 9: 602. 

 1835. Type: MEXICO: Veracruz, Hacienda de 

 la Laguna, Schiede 272 (Holotype presumably 

 HAL, n.v.; Isotypes F (photos MEXU, 

 PTBG), LE, n.v.(fragment F), MO (photos 

 MEXU, PTBG), US (photos MEXU, PTBG)). 



Sommera chiapensis Brandegee, Univ. Calif. 

 Publ. Bot. 6: 196. 1915. Type: MEXICO: 

 Chiapas, Finca Irlanda, Jun 1914, C. A. 

 Purpus 7263 (Holotype UC 174914. n.v.; 

 Isotypes F (photos MEXU, PTBG), MO, 2 

 sheets (photos MEXU, PTBG), US (photos 

 MEXU, PTBG)). 



Sommera donnell-smithii Standi., Contr. U.S. 

 Natl. Herb. 17: 436. 1914. Type: COSTA 

 RICA: San Jose, Alajuehta, 3000 ft., Mar 

 1894, J. D. Smith 6592 (Holotype US 245836 

 (photos MEXU, PTBG)). 



Sommera dunlapii L. O. Williams, Phytologia 

 26: 122. 1973. Type: PANAMA: Changuinola 

 Valley, 17 Jan 1924, V. C. Dunlap 351 

 (Holotype F 635718 (photo PTBG); Isotype 

 US (photos MEXU, PTBG)).— Sommera 

 donnell-smithii Standi. 



Sommera fusca Oerst. ex Standi., J. Wash. 

 Acad. Sci. 17: 339. 1927. Type: MEXICO: 

 [Presumably Oaxaca] Jocoaltepec, Jun 1842, 

 F. Liebmann 1 1 720 [=Liebmann Rubiaceae 

 36] (Holotype C, n.v.; Isotype US (photos 

 MEXU, PTBG)). 



Sommera grandis (Bartl. ex DC.) Standi., N. 

 Amer. Fl. 32: 145. 1921. Petesia grandis 

 Bartl. ex DC, Prodr. 4: 395. 1830. Type: 

 MEXICO: Without precise locality, Haenke 

 s.n. (Holotype presumably PR, n.v., fragment 

 G-DC, n.v. (microfiche 4: 395.1)). 



Sommera guatemalensis Standi., Contr. US 

 Natl. Herb. 17: 436. 1914. Type: 

 GUATEMALA: Alta Verapaz, Cubliquitz, 

 350 m, May 1902, H. von Tuerckheim 8225 

 (Holotype US 398487 (photos MEXU, 

 PTBG)). 



Sommera mesochora Standi., Contr. U.S. Natl. 

 Herb. 17: 439. 1914. Type: PANAMA: 

 Chiriqui, vicinity of El Boquete, 1000-1300 

 m, 2-8 Mar 1911, W. R. Maxon 4941 

 (Holotype US 675326 (photos MEXU, 

 PTBG)).— Sommera donnell-smithii Standi. 



Sommera montana L. O. Williams, Phytologia 

 26: 124. 1973. Type: HONDURAS: Morazan, 

 margen de la Quebrada de La Paz, en medio 

 de la floresta de pino-liquidambar de la 

 Montana Zanquin, 1600 m, 14 May 1950, A. 

 Molina R 2829 (Holotype F 1389080 (photo 

 PTBG); Isotypes EAP, n.v., US (photos 

 MEXU, PTBG)). 



Sommera parva Lorence, Novon4: 134, fig. 9. 

 1994. Type: MEXICO: Chiapas, Mun. de 

 Tila, Pie de Cerro K'abana, 900 m, 1 Jul 

 1982, A. Mendez Ton (A. Shilom Ton) 4367 

 (Holotype MEXU; Isotypes BM, F, MO 

 (photo PTBG), NY, PTBG, US, XAL). 



Sommera rivularis L. O. Williams, Phytologia 

 26: 125. 1973. Type: COSTA RICA: 

 Puntarenas, Rio Esquinas, near kilometer 42, 

 30 m, 8 Dec 1949, P. H. Allen 5431 (Holotype 

 F 1679274 (photo PTBG); Isotypes EAP, n.v., 

 F, US (photos MEXU, PTBG)).— Sommera 

 donnell-smithii Standi. 



Sommera subcordata Standi., N. Amer. Fl. 32: 

 144. 1921. Type: MEXICO: Sinaloa, 

 Colomas, 1897, J. N. Rose s.n. (Holotype US 

 866799 (photos MEXU, PTBG)).— Sommera 

 grandis (Bartl. ex DC.) Standi. 



Sommera zygocalyx L. O. Williams, Phytologia 

 26: 126. 1973. Type: MEXICO: Oaxaca, 

 Distr. Choapam [=Choapan], Yaveo, Arroyo 

 de Culebras, 430 m, 21 Mar 1938, Y. Mexia 

 9191 (Holotype F 982858 (photos MEXU, 

 PTBG); Isotypes UC (photo PTBG), US 

 (photos MEXU, PTBG)).— Sommera 

 arborescens Schltdl. 



Spermacoce L„ Sp. PI. 1: 102. 1753. Type: 

 Spermacoce tenuior L. 



Spermacoce ambigua Brandegee, Zoe 5: 180. 

 1904. Type: MEXICO: Veracruz, Cordoba, 

 Jan 1904, C. A. Purpus 41 7 (Holotype UC, 

 n.v.; Isotypes MO (photo PTBG), US (photos 

 MEXU, PTBG)).— Diodia brasiliensis 

 Spreng. 



Spermacoce apiculata Willd. ex Roem. & 

 Schult., Syst. Veg. 3: 531. 1818. Type: 

 BRAZIL: Without precise locality, 

 Hoffmannsegg s.n. (B-WI 2626, 



