ROBINSON. — NEW SPERMATOPHYTES, CHIEFLY FROM MEXICO. 31 



angustatis albo-callosis sursum paulo hispidulis, pappi setis ca. 25 

 laete albis minute barbellatis. — On limerock, Sierra Madre, above 

 Monterey, Mexico, alt. 915 m., 27 April, 1906, C. G. Pringle, no. 10,231 

 (type, in lib. Gray). This species belongs to a small but increasing 

 group of very nearly related plants, including E. Parryi Gray, 

 E. chrysostylum Robinson, and E. sphmopodum Robinson. From all 

 these species, the present one differs in its exceedingly short crisped 

 pubescence. 



Eupatorium durangense Robinson, n. sp., herbaceum 6-9 dm. 

 altum ; caule tereti oppositirameo folioso purpurascenti ubique minu- 

 teque crispo-puberulo ; foliis oppositis ovatis deflexis breviter petio- 

 latis firmiusculis obtusis vel vix acutis paulo supra basin 3-5-nerviis 

 supra viridibus pilosellis subtus vix pallidioribus leviter reticulato- 

 venosis in nervis venisque sparse pubescentibus serratis 2-3 cm. longis 

 1.3-2.2 cm. latis scabrido-ciliolatis, petiolo puberulo supra concavo 

 2-3 mm. longo ; capitulis ca. 12-floris numerosis in corymbis convexis 

 terminalibus collectis, pediceliis 5-12 mm. longis filiformibus griseo- 

 pubernlis ; involucri squamis pallide viridibus griseo-puberulis oblongo- 

 linearibus acutis valde inaequalibus sed laxe imbricatis interioribus ca. 

 4-5 mm. longis ; corollis albis 6-7 mm. longis, tubo proprio gracili 

 fauces gradatim sed distincte ampliatos subcylindratos subaequanti; 

 achaeniis nigris gracilibus 5-angulatis in angulis sursum hispidulis ; 

 pappi setis simplicibus corollam aequantibus superne laete albis basin 

 versus roseis. — Barranca below Sandia Station, Durango, Mexico, alt. 

 2135 m., 15 October, 1905, G. G. Pringle, no. 10,096 (type, in hb. 

 Gray). 

 ^ Var. angustius Robinson, n. var., foliis angustioribus ovato-lance- 

 olatis attenuates maximis 3.2 cm. longis 1.7 cm. latis supremis saepe 

 alternantibiis. — Mesa de Sandia, northwestern Durango, Mexico, alt. 

 2745 m., 14 October, 1905, G. G. Pringle, no. 10,097 (type, in hb. 

 Gray). This variety has something the appearance of E. Robinsoni- 

 anum Greene, but may be readily distinguished by its more herba- 

 ceous involucre, thickish more pubescent and regularly deflexed leaves, 

 , shorter stouter petioles, etc. 



Eupatorium erythrocomum Robinson, n. sp., suffrutescens laxe 

 procumbens ; caulibus tenuibus teretibus arcuatis ramosis atropurpu- 

 reis striatulis plerumque ca. 2 mm. diametro cum pilis moniliformibus 

 adpresse villosulis ; foliis oppositis ovatis vel ovato-lanceolatis breviter 

 petiolatis, limbo 2-2.8 cm. longo 1-1.2 cm. lato supra basin subrotun- 

 datam integram argute serrato apice acuto 3-nervio supra viridi glabri- 

 usculo subtus saepissime purpurascenti praesertim in nervis venisque 

 adpresse pilosis, petiolo tereti purpureo ca. 2 mm. longo, venis supra 



