148 B. L. Robinson. 
8—10 mm altis; involucri campanulati squamis subbiserialibus lanceolato- 
linearibus subaequalibus dorso puberulis nervosis apice attenuatis tomen- 
tellis; 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, no. 21579 
(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 haud 
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. 
22. Stevia simulans B. L. Robinson, l. c., p. 34. 
Herbacea perennis fere a basi pauciramea erecta; caule et ramis 
simplieibus teretibus purpureis foliosissimis 3—3,5 dm. altis in summa 
parte glanduloso-puberulis; foliis linearibus crassiusculis firmiusculis 
3—5-nerviis glabris 2,8—3,5 cm longis 2—5 mm latis utrinque glanduloso- 
punctatis obtusiusculis ascendentibus; capitulis paucis corymbosis saepius 
longe rigidiuseule pedicellatis ca. 1,8 cm altis 13-floris; involueri squamis 
lanceolati-oblongis 9 mm longis atropurpureis glanduloso-puberulis vix 
nervosis; corollis laete purpureis 7—9 mm longis, tubo proprio externe 
glanduloso-puberulo modice et gradatim in fauces longiuseulos ampliato, 
dentibus limbi anguste oblongis acutis patentibus vel recurvatis; styli ramis 
planis; achaeniis 5 mm longis 10-costatis subteretibus puberulis; pappo 
duplici e squamis 5 brevibus hyalinis apice rotundatis et aristis 5 atro- 
purpureis 5 mm longis erectis scabriusculis composito. 
