1562 COKTEIBUTIONS PEOM THE NATIONAL HERBARIUM 



1. Hymenostephium niicrocephaluro. (Less.) Blake, Contr. Gray Herb. 



n. ser. 54: 8. 1918. 



Gymnolomia microcephala Less. Linnaea 5: 153. 1830. 



Hymenostephium ynexicanum Benth. in Hook. Icon. PI. 12: 48. pi. 1154. 1873. 



Montanoa thomasii Klatt, Abh. Naturf. Ges. Halle 15: 328. 1882. 



?Gym,nolomia ehrenbergiajia Klatt, Leopoldina 23: 90. 1887. 



? Microcephalum ehre7ibergia7inm Schultz Bip.; Klatt, Leopoldina 23: 90. 1887, 

 as synonym. 



Gymnolomia patens abbrcriata Robins. & Greenni. Proc. Bost. Soc. Nat. Hist. 

 29: 94. 1899. 



San Luis Potosi to Oaxaca; type from Hacienda de la Laguna, Veracruz. 

 Guatemala. 



Suffrutescent or herbaceous, 1 meter high or more; stem slender, strigose or 

 strigillose; petioles slender, mostly 1 to 3 cm. long; blades ovate, 4 to 11 cm. 

 long, 1.5 to 7 cm. wide, acuminate, usually subcordate at base, serrate; heads 

 usually numerous, in rather close cymes or cymose panicles; involucre 2-seriate, 

 2 to 4 mm. high, the phyllaries mostly lance-ovate, with short, very narrow, 

 mostly spreading tips; achenes glabrous or pubescent; pappus none or of few 

 unequal squamellae. 



2. Hymenostephium guatemalense (Robins. & Greenm.) Blake, Contr. 



Gray Herb. n. ser. 54: 8. 1918. 

 Gymnolomia patens guatemalensis Robins. & Greenm. Proc. Bost. Soc. Nat, 

 ^ Hist. 29: 94. 1899. 

 Gymnolomia patens brachypoda Robins. & Greenm. Proc. Bost. Soc. Nat. Hist. 



29: 95. 1899. 

 Gymnolomia guatemalensis Greenm. Field Mus. Bot. 2: 347. 1912. 

 Hymenostephium pilosulum Blake, Journ. Bot. Brit. & For. 53: 268. 1915. 

 Oaxaca. Guatemala to Panama; type from San Miguel I^spantdn, Guatemala. 

 Suffrutescent or herbaceous, up to 2.6 meters high; stem densely and sordidly 

 spreading-pilose or pilosulous; leaves as in H. microcephalum, but rather densely 

 spread! ng-pilose or hirsute beneath; heads broadly campanulate in anthesis; 

 involucre 4 to 6 mm. high; achenes and pappus as in no. 1. 



3. Hymenostephium cordatum (Hook. & Arn.) Blake, Journ. Bot. Brit. & 



For. 53: 268. 1915. 



Wedelia cordata Hook. & Arn. Bot. Beechey Voy. 435. 1840-41. 



Wedelia suiflcvuosa Hook. & Arn. Bot. Beechey Voy. 435. 1840-41. 



Gymnopsis ? costaricensis Benth. in Oerst. Nat. For. Kjobenhavn Vid. Medd. 

 1852: 90. 1852. 



Gy7n7iopsis vulca7iica Steetz in Seem. Bot. Voy. Herald 157. 1853-54. 



Gy7nnolomia pate7is A. Gray, Proc. Amer. Acad. 5: 182. 1861. 



Gymnolomia subflexuosa Benth. & Hook.; Hemsl. Biol. Centr. Amer. Bot. 2: 

 163. 1881. 



Aspilia costaricensis Klatt, Bull. Soc. Bot. Belg. 31': 201. 1892, as to synonym. 



Montanoa serrata Rusby, Descr. New S. Amer. PI. 151. 1920. 



San Luis Potosi and Oaxaca. Guatemala to Panama and Colombia; type 

 from Realejo, Nicaragua. 



Suffrutescent, 3 to 5 meters high, or herbaceous, erect to reclining or sub- 

 scandent; stem usualh' sparsely strigillose; leaves as in no 1, often cuneate at 

 base; heads and achenes as in no. 2. "Flor amarilla" (El Salvador); "drnica'^ 

 (Guatemala). 



4. Hymenostephium superaxillare Blake, Proc. Biol. Soc. Washington 37: 



57. 1924. 

 Known onl}' from the type locality, La Bajada, Tamazula, Durango. 



