TROPICAL AMERICAN COMPOSITAE. / 



saepius patentibus curvatis stramineis firmiusculis ; capitulis 10-12- 

 floris; involucri squamis ca. 13 ovato-oblongis obtusis ciliatis dorso 

 laxe pubescentibus; corollis albidis 4 mm. longis, tubo proprio 1 mm. 

 longo glanduloso-atomifero, faucibus paullo ampliatis 3 mm. longis 

 glabris; pappi setis ca. 17, sordide albis barbellatis; achaeniis (im- 

 maturis) ca. 2 mm. longis in angulis cum glandulis globosis minutis 

 sessilibus instructis. — Colombia: at Verjon, Sept., 1917, Bro. Ariste- 

 Joscph, no. 150 A (Gr.). 



The leaves of this species vary from crenulate or serrulate to essen- 

 tially entire and at different stages of development their reticulation, 

 as seen from above, is of strikingly different size of mesh. These 

 differences, however, are very clearly those of age or of individual 

 development and have no classificatory worth. E. Aristei is clearly 

 related to the Venezuelan E. Jahnii Robinson, Proc. Am. Acad. liv. 

 248 (1918), but that species has leaves of a more elliptic-oblong 

 contour, scarcely more narrowed to the apex than to the base, their 

 teeth somewhat larger, more salient, and mucronate, the petioles 

 shorter, and the heads only about 6-flowered. 



E. (§ Subimbricata) Bridgesii, spec, no v., ut videtur herbaceum 

 (basi ignota) gracile erectum 3 dm. vel ultra altum; caule tereti 

 2-3 mm. diametro stramineo-viridi tenuiter puberulo (pilis brevis- 

 simis incurvatis); internodiis usque ad 6 cm. longis; foliis sub- 

 oppositis vel superne alternis rhombeo- vel lanceolato-ovatis utroque 

 attenuatis paullo supra- basin 3-5-nervatis 5 cm. longis 1.5-1.8 cm. 

 latis tenuiter membranaceis pallide viridibus supra praesertim ad 

 marginem scabro-puberulis subtus vix pallidioribus in nervis et venis 

 principibus albidis puberulis margine cum dentibus parvis mucro- 

 natis paucissimis (saepe utroque 1-2 solis) instructis; petiolo supra 

 canaliculato anguste marginato 4-7 mm. longo; corymbo com- 

 posito planiusculo 2-2.5 dm. diametro, ramis et pedicellis (3-6 mm. 

 longis) stramineo-viridibus puberulis; capitulis numerosis ca. 25-floris 

 7 mm. altis 4 mm. diametro; involucri squamis ca. 22 valde inae- 

 qualibus gradatis pallide viridibus plerisque 2-costulatis, extimis 

 brevibus ovato-lanceolatis acuminatis dorso paullo adpresse puberulis 

 apice squarroso-recurvatis, intermediis gradatim longioribus lanceolatis 

 attenuatis subglabris, intimis lineari-oblongis acutis glabris; corollis 

 roseis 4 mm. longis glabris sursum sensim ampliatis limbo extus paullo 

 granulatis; achaenis atro-brunneis in costis pallidioribus sursum 

 hispidulis; pappi setis ca. 27 vix 2.5 mm. longis barbellatis.— Bolivia: 

 without locality. Bridges (K., phot, and fragm. Gr.). 



E. celtidifolium Lam., var. hirtellum Robinson, Proc. Am. Acad. 



