Phytologia (Aug 2004) 86(2) 89 



Prostrate rhizomatous perennials forming clumps 20-50 cm across 

 (label data). Stems purplish, bearing up-turned appressed hairs. Leaves 

 opposite; blades narrowly to broadly oval, 1.5-2.2 cm long, 0.6-1.0 cm 

 wide, 3 -nervate from near the base, pubescent above and below like 

 the stems; margins weakly serrulate. Heads terminal, single, ca 3.5 

 cm across the extended rays. Peduncles 3-5 cm long. Involucres 8-9 

 mm high, ca 10 mm wide (pressed); outermost bracts 3-5, lanceolate, 

 eciliate; inner bracts 5-8, oblanceolate, ca as long as the outer bracts, 

 their apices scarious, rounded, ciliate. Receptacular bracts lanceolate, 

 somewhat longer than the subtended florets. Ray florets 7-8, neuter; 

 ligules yellow, ca 1 .5 cm long, 0.3-0.5 cm wide. Disk florets ca 20, fertile; 

 corollas yellow, glabrous, 6-7 mm long. Anthers black, their appendages 

 eglandular, linear-lanceolate, ca 1 mm log. Achenes (immature) ca 3 mm 

 long, appressed-pubescent, the pappus a short erose crown. 



TYPE: MEXICO. OAXACA: SANTIAGO JUXTLAHUACA. 



Mpio. San Martin Peras, "Km 18 de la desviacion a Canada de Lobos 

 sobre el nuevo camino a campos de fresas." 2000 m, 24 Oct 1994, J. L. 

 Panero 5274 (HOLOTYPE: MEXU; ISOTYPES: MSU, TEX!). 



This novelty is closely related to W. hintoniorum, having most of 

 the attributes of that species. When the latter was first described I took 

 its ligules to be yellow, although, as noted in the description, this was 

 not clear in the holotype. Subsequent collections prove the corollas to 

 be white (Panero 7352, 5 Oct 1997, TEX), this also noted by Strother 

 (1991). 



The species is named for Santiago Juxtlajuaca, where first 

 collected. 

 WEDELIA KEILII B. L. Turner, Phytologia 65: 353. 1988. 



Known only from the type (ca 25 km s of Uruapan, Mic), grassy 

 hillsides, ca 1000 m; Aug. 



Perennial herbs to 25 cm high; much-resembling W. mexicana but 

 the leaves with markedly lacerate margins and the plants densely soft- 

 pilose throughout; chromosome number, n = 22 pairs. 



