STANDLEY TEEES AND SHRUBS OF MEXICO 1571 



Branching shrub; stem strigillose; leaf blades oblong-ovate or ovate-lanceolate, 

 7 to 11 cm. long, obscurely serrulate; heads 1 cm. wide; rays very small; outer 

 phyllaries with spreading spatulate tips. 



3. Otopappus salazari Blake, Proc. Biol. Soc. Washington 32: 192. 1919. 

 Southern Sinaloa; type from Ixtagua. 



Scandent shrub; stem strigillose; leaf blades lance-ovate, 9.5 to 12 cm. long, 

 2.5 to 4 cm. wide, denticulate, slightly rough-strigillose above with somewhat 

 tuberculate-based hairs; heads about 13 in a ternately divided panicle; phyllaries 

 with slighth' spreading apex; rays about 5 mm. long. 



4. Otopappus microcephalus Blake, Journ. Bot. Brit. & For. 53: 232. 1915. 

 Colima and Guerrero; type from Manzanillo, Colima. 



Shrub 2 to 3 meters high; stem strigillose; leaf blades ovate, 4.5 to 9 cm. long, 

 rough or roughish above; heads rather numerous, cymose-panicled; phyllaries 

 with small spreading herbaceous tips; rays about 2 mm. long. 



5. Otopappus scaber Blake, Contr. U. S. Nat. Herb. 22: 636. 1924. 

 Known only from the type localitj", Apazote, near Yohaltiin, Campeche. 

 Apparently scandent; leaf blades oblong-ovate, 5 to 9 cm. long, 2 to 3.5 cm. 



wide, serrulate, rough on both sides; heads and involucre much as in 0. verbe- 

 sinoidcs, 2.7 to 3 cm. wide. 



6. Otopappus pringlei (Greenm.) Blake, Journ. Bot. Brit. & For. 53: 232. 



1915. 



Otopappus epaleaceus pringlei Greenm. Proc. Amer. Acad. 40: 42. 1904. 



Morelos and Guerrero; type from Cuernavaca, Morelos. 



Shrub; leaf blades ovate, 4.5 to 7.5 cm. long, dentate, very harsh above, rather 

 densely hispidulous and strongly prominulous-reticulate beneath; heads 1 to 1.2 

 cm. wide, in terminal cymes of 5 to 7; phyllaries with minute herbaceous tips; 

 rays about 2 mm. long. 



7. Otopappus xanthocarphus T. S. Brandeg. Univ. Calif. Publ. Bot. 3: 394. 



1909. 



Known only from the type locality, Cerro de Castillo, near Zapotitlan, Puebla. 



Trichotomously branched shrub; leaf blades ovate or ovate-oblong, 1.2 to 2.7 

 cm. wide, acute, serrate-dentate, very rough above, roughish-hispidulous beneath; 

 heads about 1 cm. thick, in terminal 3 or 5-headed cymes; involucre 5 mm. high, 

 the outer phyllaries herbaceous. 



8. Otopappus robustus Hemsl. Biol. Centr. Amer. Bot. 2: 191. pi. 49. 1881. 

 Zexmenia robusta O. Hoffm. in Engl. & Prantl, Pflanzenfam. 4^: 230. /. 116, 0. 



1890. 



Known only from the type locality, Valley of C6rdoba, Veracruz. 



Scandent shrub; leaf blades ovate, acuminate, roughish above, densely and 

 rather softly pilosulous beneath; heads rather numerous, cymose-panicled; 

 involucre 6 to 7 mm. high. 



74. OYEDAEA DC. Prodr. 5: 576. 1836. 



Reference: Blake, Revision of the genus Oyedaea, Contr. U. S. Nat. Herb. 

 20: 411-422. 1921. 

 1. Oyedaea ovalifolia A. Gray, Proc. Amer. Acad. 5: 183. 1861. 



Oyedaea ampeloides Hcmsl. Biol. Centr. Amer. Bot. 2: 176. 1881. 



Veracruz and San Luis Potosi; type from Huautla, Veracruz. 



Reclining or scandent shrub, 3 to 6 meters long or more; stem strigillose, gla- 

 brate; leaf blades oval to ovate, 8 to 18.5 cm. long, 5 to 8 cm. wide, acute or 

 obtuse, crenate-mucronulate, harshly strigillose above, strigillose beneath, on 

 petioles 5 to 17 mm. long; heads 3 to 5.5 cm. wide, radiate, yellow, several or 

 numerous in an open panicle; involucre 3-seriate, 4 to 5.5 mm. high, of triangular- 

 ovate to oval indurate phyllaries; rays neutral; aclienes compressed, 2-winged; 

 pappus of 2 slender awns and about 10 basally united squamellae. 



