40 ROBINSON. 
*: ate ae herbs; leaves 2-4.5 (-—5) em. wide; heads 
l. Heads nae 7-flowered, sessile in dense subglobose 
glomerules; involucre ’ subcylindric ise ies eae : Bae tenuifolium. 
volucre turbinate-campanulate............. E. pyenocephalum, 
t. a annual; leaves thin, 2-5.5 cm. wide; inflorescence 
diffus 23. E. microstemon. 
Brickellia ? Arsenei, spec. nov., herbacea perenne virgata 7 dm. 
vel ultra alta; nee tereti gracili usque ad 3 mm. crasso folioso paullo 
flexuoso atropurpureo crispe griseo-puberulo; internodiis 1.5-4 em. 
_longis; foliis a een vel saepe ternatim verticillatis sessilibus 
lanceolatis argute acuminatis basi rotundatis serrulatis chartaceis 3-45 
cm. longis 1-1.6 em. latis penniveniis supra reticulatis et minute granu- 
latis subtus paullo pallidioribus reticulatis et in costa media et in venis 
majoribus puberulis; inflorescentia terminali multicapitata corymbosa 
convexa; capitulis graciliter geese ca. 12-floris ca. 1 cm. longis; 
involucri squamis ca. 20, 3-4-seriatim imbricatis regulariter gradatis, 
extimis brevissimis puberulis cutee lanceolato-oblongis obtusi 
glabris 3-nerviis in parte exposita atro-vinaceis; flosculis valde immaturis; 
corollae dentibus anguste oblongis ; antheris angustis ad apicem 
longiuscule appendiculatis; pappi setis albidis vix scabridis. — MExi00: 
vicinity of Morelia, State of Michoacan, 26 Oct., 1911, alt. 2500 m, 
Bro. G. Arsene, no. 5608 (Gr., U. S.), distributed as Eupatorium pulchel- 
lum HBK. It is unfortunate that this beautifully distinct plant, 
obviously of the Eupatorium tribe, is available only in bud, so that it is 
impossible to determine the form of the mature achenes. However, 
as it is unlikely that the locality will be visited by a botanist fo ae 
time to come, and as the habit and such details of floral structure a 
are shown pretty clearly indicate that this is a new species of Bri this 
§ Steviastrum, the writer ventures to give it provisional record on | 
theory. It is a pleasure to dedicate it to Bro. Arséne, whose 
collections are among the most extended and valuable which have come 
from Mexico in recent yea i 
CALEA CARACASANA (HBK) Ktze., var. PrLosior Ktze. Rev. Gen. | 
324 (1891). Of this more hairy variety of this common and in no 
South America somewhat widely distributed and variable sf sec 
there is, besides the more common radiate state, a discoid form 
may be recorded as follows: “osior 
Forma discoidea, forma nova, pubescens ut apud var. alt eos 
capitulis homogamis, radiis nullis.— COLOMBIA: forest, 3” 
1500 m., “La Virginia,” Libano, Dept. Tolima, 22 
Pennell, no. 3264 (N. Y.). Florets greenish-yellow. 

