EOBINSON. — ALOMIA, AGERATUM, AND OXYLOBUS. 449 



glabris viridibus subtiis vix pallidioribus minute glanduloso-punctatis 

 7-10 cm. longis 2.5-3.8 cm. latis supra basin 3-nerviis; corymbis in 

 ramis terminalibus densis pauci(5-8)-capitulatis longiuscule peduncu- 

 latis; bracteolis parce pubescentibus linearibus; pedicellis 3-5 mm. lon- 

 gis rectis; capitulis pro genere majusculis 7-9 mm. diametro; invol- 

 ucri turbinato-campanulati squamis ovati- vel obovati-oblongis planis 

 ecostatis acutis erosis pallidis subaequalibus (extimis paucis multo 

 angustioribus exceptis) ; receptaculoundique paleifero; paleis corollas 

 subaequantibus apice subulatis pallidis induratis; corollis 2.2 mm. 

 longis glabris limbum versus caeruleo-purpureis, tubo proprio faucibus 

 paullo ampliatis longiore; achaeniis nigris glabris 5-angularibus saepe 

 arcuatis basi callosis apice cum annulo parvo albido subintegro coro- 

 natis. — Guatemala: prope Nenton, alt. 900-1225 m., 13 Dec. 1895, 

 E. W. Nelson, n. 3528 (hb. Gray., sub nomine Isocarpha cchioides 

 distributa). 



13. A. isocarphoides (DC), comb, nov., suflFruticosa; caule tereti 

 hispido-pubescenti usque ad inflorescentiam terminalem compositam 

 foliato; foliis oppositis 3-nerviis lanceolatis integriusculis vel crenato- 

 dentatis subsessilibus supra scabridis subtus velutino-villosis acumina- 

 tis basi cuneato-angustatis; inflorescentia oppositi-ramea ; capitulis 

 ca. 25-floris in corymbis densis dispositis. — Coelestina isocarphoides 

 DC. Prod. v. 107 (1836), incl. /S dentata. Ageratum isocarphoides 

 (DC.) Hemsl. Biol. Cent.-Am. Bot. ii. 82 (1881). Carelia isocar- 

 phodes [DC] Ktze. Rev. Gen. i. 325 (1891). — Mexico, sine loci 

 indicio accuratiori, Haenke (hb. DC, phot, in hb. Gray.); in cultis 

 prope Orizabam, Botteri & Sumicrast, n. 524 (hb. Gray., immatura et 

 dubitativa). Species minus cognita, an cum sequenti conjungenda? 



14. A. echioides (Less.), comb, nov., herbacea perennis; radice 

 fibrosa; caulibus solitariis vel paucis virgatis suberectis simplicibus 

 vel rariter ramosis saepius ad mediam partem solum foliosis hirsuto- 

 villosis ; foliis lanceolati-oblongis 3-costatis serrato-dentatis vel saepius 

 integriusculis basi cuneatis apice gradatim angustatis sed vix vero 

 acutis 2.5-9 cm. longis 8-18 mm. latis utrinque villoso-hirsutis subtus 

 paullo pallidioribus glanduloso-punctatis; corymbis terminalibus 

 saepius densis rarius trichotomis et laxioribus ; bracteis parvis lineari- 

 bus; capitulis 7 mm. diametro ca. 50-floris; involucri campanidati 

 squamis lanceolato-oblongis viridibus vel purpurascentibus ciliolatis 

 saepius 2-costatis apicem versus subinduratis pallidioribus; recep- 

 taculo valde elevato subcylindrato-conico undique paleifero; corollis 

 subcylindricis sparse pubescentibus 3 mm. longis caeruleo-purpureis, 

 tubo proprio fauces vix ampliatas fere aequante; achaeniis nigris 



