OF THE MATTO GROSSO EXPEDITION, 1891-92. 509 
PococHroA, Graminearum, e tribu Chloridearum, gen. nov. (Tab. XX XVII. figg. 9-23.) 
Spicule 5-floree, a latere compressee, secus rhachidis elongate facies inferiori-laterales 
continuas concavas distiche insertze ; rhachilise breves vel subnullee, rhachidi appresse. 
Flosculi, flosculo supremo (rarius flosculis duobus superioribus) tabescente exempto, 
hermaphroditi. Glume due, membranacese, leviter carinatee, acuminate, haud 
aristatee, valvulis breviores, gluma superior plurinervis quam inferior paucinervis 
major. Valvulee dus, membranacez ; valvula inferior elongata, navicularis, 3-nervis, 
raro subobsolete 5-nervis, apice breviter bidentula, rarius subintegra, carinata, carina 
in aristam longam terminalem excurrens, nervi laterales haud excurrentes; valvula 
superior bicarinata, acuminata, flosculi supremi fere ad meram aristam imminuta. 
Stamina 3; filamenta brevia; antherse minute, inclussee. Pollinis grana minutissima, 
ambitu subsph:zerica. Ovarium stipitatum, glabrum. Squamule duse, apice denti- 
culate. Styli a basi liberi. Stigmata elongata, plumosa.  Caryopsis ambitu 
anguste linearis, paleà inclusa sed ei nequaquam connata, antice aeutata, postice 
suleata; hilum minimum. Scutellum oblongum, obtusissimum, caryopside circa 
4-plo brevius. Folia plana, juvenilia convoluta. Ligula brevissima, membranacea, 
apice ciliato-barbata. Rhachides simplices, elongate, a basi ipsá spiculigere, 
axi communi plerumque singillatim vel subopposite inserta. 
POGOCHLOA BRASILIENSIS (sp. nov.); culmo erecto terete, subtiliter striato, una cum 
nodis glabro, in sicco viridi-lutescente ; foliorum vaginis circum culmum arcte 
convolutis, striatis, glabris, dilute lutescenti-viridibus, foliis linearibus longe ac 
sensim acuminatis, glabris, deorsum levibus, sursum  scabriusculis, nervosis, 
glaucescentibus, 32:0 em. long., 0:65 em. lat. ; rhachidum axe communi erecto, leviter 
torto, gracili, quadrangulari, scabro, ultra 30°0 em. alt.; rhachidibus erecto-ascen- 
dentibus vel subpatulis, tenuibus, fere rectis, scabriusculis, plerisque 7:0-14:0 cm. 
long., supremis imminutis ; rhachillis rhachidi applicatis, subteretibus, scabriusculis, 
plerisque 0:1 em. (vel paullo ultra) long.; spiculis, aristis haud exemptis, modicis, 
2:0 em. long. 0'l cm. lat., dilutissime viridibus; glumá inferiore lanceolata, 
acuminatà, 2-5-nervi, nervis lateralibus interdum subobsoletis circa 0:5 cm. long. ; 
glumá superiore 0°6 cm. long., breviter acuminata, 6-9-nervi; valvulà inferiore 
lanceolata, scabridá, inferne dorso barbatulá, 0:8 cm. long., aristá tenui rectá vel 
inferne geniculatá usque ad 1*0 em. long. instructá, paleá lineari-lanceolatá, 0:4-0:45 
cm. long., apice bidentatá, squamulis subquadratis apice denticulatis; antheris 
minutis, ambitu ellipticis; ovarii stipite ovario ipsi sequilongo; stigmatibus 0:14 
cm. long.; bruneis, caryopside 0'4 cm. long., vix 0-1 cm. lat., in sicco griseo-fuscá, 
stigmatibus et deinde solummodo stylis persistentibus coronatá. 
Hab. Reperi ad Coimbra mens. Feb. florentem. (N. 1080.) 
After several unsuccessful attempts to place the grass here described, I have resolved 
to make a new genus for its reception. The affinity is undoubtedly with Leptochloa and 
with Diplachne, the latter a genus referred by the authors of the * Genera Plantarum’ 
to Festucacez, although, since its spiculigerous axes are undoubtedly dorsiventral, that 
