248 ROBINSON. 
6-7 cm. longis 2.4-3 cm. latis basi apiceque exceptis crenato-serratis 
(dentibus 4-7 mm. latis vix usque ad 1 mm. altis) supra basin 3-nerviis 
supra minute hirtellis subtus in nervis venisque molliter pubescentibus 
crebre aureo-punctatis; corymbis terminalibus densiusculis convexis 
multicapitulatis ca. 1 dm. diametro; capitulis ca. 10-floris 9.5 mm. 
longis 3-4 mm. crassis sessilibus ad apices ramulorum ternis et qua- 
ternis fasciculatis; involucri gracile cylindrici 7 mm. alti squamis ¢a. 
18 ca. 4-5-seriatim imbricatis ‘plerisque anguste oblongis basi laete 
albis glabris apicem versus breviter subherbaceis viridibus vel (in- 
timis) pulchriter roseo-purpureis, apice subherbaceo squamarum 
intermediarum plus minusve squarroso subpatente acutiusculo tomen- 
tello; corollis ut videtur roseis 4.5 mm. longis, tubo proprio 1 mm. 
longo, faucibus vix distinctis sensim sursum ampliatis extus 5-nerviis 
inter nervos cum glandulis stipitatis paucis munitis; achaeniis gracili- 
bus 3.3 mm. longis in costis et in faciebus breviter hispidulis; nectario — 
conspicuo depresso; pappi setis ca. 28 capillaribus laete albis 4 mm. 
longis.— CotomBia: open hillside, edge of forest, Las Nubes near 
aN Marta, alt. 1370 m., December, H. H. Smith, no. 615 (TYPE 
ae 
A highly attractive species distributed under the name of Eupa- 
torium pulchellum HBK., a Mexican plant with alternate shorter- 
petioled leaves and obtuse unappendaged involucral scales. The 
name iridolepis alludes to the parti-colored involucral scales which 
under low magnification have unusual beauty of form and color. 
E. (§ Eximbricata) Jahnii, spec. nov., fruticosum; caulibus (vel 
ramis) teretibus 5 mm. diametro purpureo-brunneis juventate viscl- 
dulis molliter villosis maturitate glabratis plus minusve vernicosis; 
internodiis ca. 3 cm. longis; foliis oppositis breviter petiolatis oblongis 
coriaceis acutis vel saltim acutiusculis margine (basi cuneata excepta) 
serrato-dentatis (dentibus 0.5-0.8 mm. altis 4-5 mm. latis) penn 
veniis (venis ca. 10-jugis) supra subglabris (costa et venis juventate 
paullo villoso-lanulatis) subtus in costa venisque sordido- vel fulvo- 
villosis vel -lanatis 6-9.5 em. longis 2.3-4 cm. latis; petiolo ca. 8 mm. 
longo supra sulcato basi paullo dilatato;: corymbo terminali sessili 
composito trichotomo multicapitulato planiusculo vel leviter convex° 
8-10 cm. diametro; capitulis 6-floris ca. 11 mm. altis 4 mm. diametro; 
involucri anguste campanulati squamis ca. 11 lanceolatis inaequalibus 
laxe (ca. 2-seriatim) imbricatis viscidis ciliatis; corollis 6 mm. long! 
glabris; tubo proprio ca. 1.8 mm. longo; faucibus ca. 4.2 mm. long's 
gradatim leviterque sursum dilatatis; dentibus limbi 5 lanceolato- 
deltoideis recurvatis; antheris apice cum appendice longiuscula 
