18 ROBINSON 
rugulosis subtus praecipue in costa et venis adpresse pubentibus 
chartaceo-coriaceis; petiolo gracili 7-9 mm. longo; panicula_ termi- 
nali ca. 3 dm. longa et 2 dm. crassa fere ad apicem foliaceo-bracteata; 
inflorescentiis particularibus oppositis pedunculatis hirtellis paten- 
tibus; pedicellis plerisque 3-4 mm. longis; bracteolis lanceolato- 
linearibus'ca. 2 mm. longis e summo pedicello orientibus; involucri 
squamis lineari oblongis acutiusculis atrorubescenti-brunneis sub- 
glabris maturitate 4.5 mm. longis; corollis albis glabris, tubo proprio 
1.5 mm. longo, faucibus campanulatis eum longitudine subaequan- 
tibus dentibus limbi ca. 1 mm. longis; achaeniis fusco-olivaceis lucidis3.7 
mm. longis; pappi setis ca. 36 brunnescenti-albidis—PErv: in shrubby 
places between Tambo Yuncacoya and Tambo Cachicachi on the 
way from Sandia to Chunchusmayo, Dept. Puno, alt. 1800-2200 m., 
Dr. A. Weberbauer, no. 1137 (Berl., phot. and fragm. Gr.). 
This species differs from the other Peruvian members of § Panicu- 
latae which have pinnate-veined leaves as follows: from M. lanceo- 
lata Hieron. by its slender-pedicelled heads, from M. trachodes Robin- 
son in its much narrower leaves and (at maturity) smooth stem, and 
from M. Mathewsii Robinson by its narrower and thicker leaves 
which are not whitened or glaucous beneath. 
M. ticustrirouia DC., var. subsessilis, var. nov., habitu et 
multis var. typicae similis differt foliis ternatim verticillatis subtus 
fusco-punctatis subsessilibus integriusculis; petiolo latiore quam 
longo (vix 1 mm. longitudine excedente).—Braziu: shrub on sav- 
annas, Campos do Jordao, Sao Paulo, Feb. 1890, alt. 1800-2000 m., 
J. T. de Moura, no. 829 (Berl., phot. Gr.)._ In typical material (var. 
typica) of this species the leaves are opposite and narrowed at the 
base to a slender petiole 4-12 mm. in length. Although by DeCan- 
dolle and by Baker described as glabrous, this species seems normally 
to be (under a lens) more or less glandular-puberulent at least n the 
inflorescence. 
M. (§ Paniculatae) Mathewsii, spec. nov., verisimiliter volu- 
bilis; caule tereti striato usque ad 5 mm. vel ultra diametro lignes- 
cente juventate fulvescenti-villoso (pilis patentibus plerisque curvatis) 
denique glabriusculo; internodiis usque a m. longis; foliis late 
ovatis acuminatis apice vero obtusiusculis basi breviter acuminatis 
membranaceis 9-14 cm. longis 4-9 cm. latis integerrimis margine 
anguste revolutis penniveniis supra glabris sublucidis subtus griseis 
fusco-puncticulatis in costa media et in venis principibus (4-jugis) 
puberulis aliter glabris tenuiter laxeque reticulato-venulosis; panl- 
cula composita magna foliaceo-bracteata 3 dm. vel ultra longa, pat 
