KOBINSON. — STUDIES IN THE EUPATORIEAE. 33 



Alomia dubia, n. sp., herbacea erecta perennis sordide pubescens 

 4-7 dm. alta; radice lignescenti ramosa; caulibus 1 vel pluribus 

 teretibus striatulis foliosissimis ad inflorescentiam corymbosam simpli- 

 cissimis ; foliis alternis oblanceolatis obtusiusculis crenato-serratis 2-3 

 cm. longis 4-10 mm. latis basi attenuates subpetiolatis utrinque dense 

 et sordide pubescentibus supra rugulosis subtus reticulatis ; corymbis 

 laxe ramosis 7-15 cm. latis supra modice planis, ramis ascendentibus 

 saepius 3-5-capituliferis, bracteis linearibus 5-15 mm. longis; capitulis 

 ca. 6o-floris ca. 1 cm. diametro 8-10 mm. altis ; involucri campanulati 

 squamis subbiserialibus lanceolato- linearibus subaequalibus dorso pu- 

 berulis nervosis apice attenuatis tomentellis ; corollis roseis 4 mm. 

 longis, tubo proprio gracili externe glanduloso-hirsutulo basi plus 

 minusve expanso supra in fauces turbinato-campanulatos gradatim 

 ampliato, limbo purpurascenti-tomentello ; achaeniis nigris 5-angulatis 

 glaberrimis basi mediocriter angustatis apice rotundatis ab annulo 

 albido cartilagineo coronatis omnino calvis. — Brazil, presumably from 

 the Prov. Goyaz, Dr. A. Glaziou, n. 2 1579 (hb. Kew.). 



Although there can be no doubt that this species is technically an 

 Alomia and must be referred to that genus, as the genera of this affinity 

 are now divided, it must be confessed that Alomia looks suspiciously 

 like an artificial aggregate of species which may well have had a very 

 different origin. Its species are varied in habit, and approach on the 

 one hand so close to Ageratum, and on the other to Trichogonia, that 

 it may well be doubted whether they are not, at least in some cases, 

 "formae epapposae " of these genera. The present species closely 

 resembles in habit and many of its features Trichogonia. It should 

 be noted that forms of at least two species of Trichogonia have been 

 found in which part or all the achenes were entirely destitute of 

 pappus. The species here described, however, is clearly distinct from 

 any hitherto characterized species of either genus. Trichogonia with 

 its plumose setiform pappus is certainly very distinct from Ageratum 

 with a pappus of few distinct or somewhat connate scales, yet the 

 Alomiae, which are entirely destitute of pappus or have only an 

 annular rudiment in its place, show such transitions of habit, involucre, 

 pubescence, etc., that they neither carry conviction as a distinct genus, 

 nor are they capable of satisfactory grouping as pappusless forms of 

 the pappus-bearing genera. The genus Alomia is as yet very poorly 

 represented in herbaria, and until further material has been collected, 

 it seems impracticable to revise the generic limits of the three genera 

 here concerned. 



Hartwrightia floridana Gray, Proc. Am. Acad, xxiii. 265 (1888). 

 In characterizing this monotypic genus from Florida, Dr. Gray un- 



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