276 PROCEEDINGS OF THE AMERICAN ACADEMY. 
filiformibus divergentibus 3 mm. longis; capitulis numerosissimis parvis 
4 mm. longis ca. 14-floris ; involucri campanulati squamis valde inaequali- 
bus sub-3-seriatim imbricatis, extimis brevissimis parvis paucis lanceolatis 
subacutis puberulis, interioribus elliptico-oblongis obtusis vel rotundatis 
supra mediam partem pubescentibus 2.2 mm. longis, receptaculo leviter 
convexo paleaceo, paleis caducis linearibus obtusiusculis apice puberulis ; 
corollis albis minute sparseque glandulosis 2 mm. longis, faucibus grad- 
atim ampliatis tubo proprio vix longioribus, dentibus limbi ovato-deltoideis 
acutiusculis brevissimis recurvatis ; antheris subtruncatis sed inter apicibus 
thecarum connectivo valde expanso evasculoso ; achaeniis brevibus deorsum 
angustatis in costis 5 sursum hispidulis, setis pappi ca. 15 albis sursum 
barbellatis 1.7 mm. longis. — In granitic soil, Sierra Madre in the State 
of Guerrero, Mexico, altitude 1200 m., 4 November, 1898, E. Langlassé, 
no. 565 (type, in hb. Gr.). This species shows in its anthers a transition 
to Ophryosporus. However, the modification of the upper part of the 
connective into an expanded transparent spongy cushion devoid of vas 
cular tissue is clearly a rudimentary form of the terminal appendage. In 
the true species of Ophryosporus, on the other hand, no such rudiment 
is visible even under the compound microscope. Furthermore, the true 
Ophryospori have an involucre of nearly equal subuniseriate scales and & 
naked disk. ‘ 
Eupatorium Michelianum, n. sp. Fruticosum 1.25 m. altum; 
ramulis teretibus gracilibus rectis foliosis ful vo-glanduloso-hirsutulis 5 
foliis oppositis subsessilibus basi rotundatis vel cordatis subamplexicauli- 
bus elongato-oblongis attenuatis argute serrulatis firmiusculis ad 13 em. 
subtus pallidioribus aureo-atomiferis ; paniculis terminalibus opposttifa- e 
meis bracteatis rotundatis ca. 1 dm. diametro ca. 90-capitatis, pedicellis Be 
teretibus ca. 5 mm. longis; capitulis ca. 22 floris ovoideo-cylindricis 1 oth .< 
longis ; squamis involucri arcte adpressis multiseriatim imbricatis apice 
rotundatis erosis discoloribus, extimis brevissimis suborbicularibus, intimis. 
anguste linearibus; corollis albis anguste tubulosis sursum vix ampliatlsy - 
limbo patente breviter 5-dentato; antheris apice longe appendiculatis 5 
achaeniis prismatis 5-costatis deorsum leviter angustatis 3.3 mm. 1ongh 
in costis hispidulis. —In granitic soil of the Sierra Madre, Guerrero; 
Mexico, altitude 1200 m., 7 December, 1890, Z. Langlassé, 00- 589 
(type, in hb. Gr.). This species is allied to Z. glaberrimum, DC., but: 
glandular-hirsute. It is also near H. Oerstedianum. Benth., from whieh : 
it differs in its hispidulous achenes and narrower involucre, the lowest 
scales being suborbicular and not at all herbaceous. It is dedicated < 
