OF THE MATTO GROSSO EXPEDITION, 1891-92. 389 
Pectis ($ PEcTIDOPSIS) JANGADENSIS (sp. nov.). Pusilla, annua, caulibus brevibus, erebre 
ramosis, tenuibus ; foliis sparsis, nequaquam rosulatis, anguste linearibus ; capitulis 
parvis, longipedunculatis ; pedunculis squamis parvis distantibus munitis, circa 10- 
floris; involueri campanulati bracteis 4—5, disco brevioribus; pappi setis 2 vel 0, 
squamellis minutis intermixtis. 
Hab. Crescit in loco arenoso tempore pluviorum inundato ad Jangada, ubi mens. Sept. 
floret. (N. 250.) | 
Herba diffusa nec ultra 8:0 cm. alt., ramulis crebris, patulis, foliatis. Radix tenuiter 
fibrosa, sparsissime radicellifera, saltem in sicco undulata. Caulis nee ultra 0:05 
em. diam., tetragonus, purpureus. Folia usque ad 1*0 em. long., plerumque 0:5-0-7 
cm., raro vix usque ad 0:2 em. lat., plerumque circa 01 cm., acuta, juxta margines 
glandulosa, deorsum setoso-ciliata, firma. Pedunculi gracillimi, usque ad 3:0 cm. 
long., plerique 1:5-2:0 cm., squamze eorum 1-3, lanceolatee vel subulatee, acumi- 
nate, nec ultra 0:07 cm. attingentes. Capitula 0:3 em. diam. — Involueri bracte:e 
lanceolato-oblong:e, acute, dorso carinatee, obsolete glandulos:s, 0:4 em. long., 01 
cm. lat. Ligule circa 5, vix 0:3 em. long., supra luteæ, dorso rubree. Disci corollæ 
0:15 em. long.; ejus lobi deltoidei, obtusissimi. ^ Ach:enia angustissime linearia, 
sursum paullulum et sensim ampliata, leviter compressiuscula, longitrorsum costu- 
lata, puberula, atrata, 0°25 cm. long. Pappi set: debiles, paullo divergentes, 
scabriusculze, 0:15 cm. long. 
Planta cum nullà Brasiliensi hucusque cognitá conferenda, nobis videtur ad P. fili- 
pedem, A. Gray, stirpem Mexicanam, spectare, sed certe haud conspecifica ob coroll: 
minoris inapertze non acute lobos altius connatos, et preesertim, inter alia, achenia et 
pappum longe diversum. A P. jaliscana, Hook. et Arn., etiam Reipublice Mexican:e 
incola, distat, preter alia, statura humiliori, involucri bracteis obsolete nec conspicue 
elandulosis, corollze lobis comparate latis et obtusissimis, achzenio longiore ac crassiore 
pappo paullo breviore coronato. | Mexico. | 
Up till now no Pectis belonging to the section Pectidopsis has been reported from 
Brazil. These little plants are very liable to be overlooked owing to their small size, and 
I should not have secured my specimens but for the chance of being attracted to the 
abundant but lowly vegetation growing at one particular spot close to Jangada village. 
The same spot yielded Oxypetalum clavigerum and Asclepias jangadensis, both new 
species. 
CHUQUIRAGA CHAPADENSIS (sp. nov.); caule erecto, ramulis ascendentibus, basi inter- 
dum breviter bispinosis, ramoso, subtereti, glabro, irregulariter striato; foliis ses- 
 silibus, ovato-oblongis ovatisve, acutis vel obtusis, raro obtusissimis, basi obtusis, 
5-nervibus, coriaceis, utrinque appresse pilosis vel omnino glabris; capitulis majus- 
culis, paucis, confertis vel subconfertis, sessilibus vel breviter pedunculatis, circa 
50-floris; involucri campanulati bracteis extimis late ovatis, obtusissimis, bruneis, 
"nitentibus, glabris vel puberulis, erosis, ciliolatis; pappi setis quam ach:enia fere 
3-plo longiora. 
