OF THE MATTO GROSSO EXPEDITION, 1891-92. 501 
30:0-40:0 cm. long. Spatha ad 12:0 cm. long., basi L:5-2:0 em. diam., lamina 
expansa 2°0 cm. lat. Inflorescentia feminea 2:5 cm. long., 1:0 cm. diam., dimidium 
inferius dorso spathee adnatum ; mascula sterilis 4°0 cm. long., attenuata; mascula ' 
fertilis 4°0 cm. long., 0'5 em. diam. Synandria 4-andria, 0°1 em. diam. 
The only peculiarity about this plant is in its placentation ; instead of several ovules 
attached in series all the way up the dissepiment, the arrangement characteristic of 
Caladium, we here find only three ovules springing almost from the same point near 
the middle of the dissepiment. I cannot help thinking that, as Aroideous genera now go, 
this would by some be considered sufficient warrant for describing our plant as a new 
genus; but I refrain from so doing in deference to the opinion of Mr. N. E. Brown, who 
kindly looked at the specimens, and who on matters concerning this group is, it need 
scarcely be said, our best authority. 
APHYLLARUM, Aroidearum (Colocasiearum sensu Benth. et Hook. f.) gen. nov. 
(Tab. XXXV. figg. 1-12.) 
Spadices inappendiculate, deorsum flores fem., sursum flores masc. proferentes, pars 
intermedia floribus masculis imperfectis elongatis instructa. Perianthium 0. Fl 
masc. synandrium incrassatum 3—4-andrum, ambitu pentagonum vel hexagonum ; 
antherarum loculi contigui, paralleli, insequilongi, rimis apicalibus dehiscentes. 
Fl. fem. ovarium oblongum, obtusum, bilateraliter compressum, 2-loculare, stigmate 
sessili late truncato incrassato obscure lobato coronatum ; ovulum quovis in loculo 
unicum, pæne e basi dissepimenti ortum, erectum, funiculo brevi insidens anatropum 
raphe dorsali et micropyle infera. Pedunculi elati, preecoces, solitarii, e latere 
tuberis fere nudi. Spathee tubus amplus, eonvolutus, fauce parum coarctatus ; 
lamina erecta, subeucullata. Spadix a spathà superata, breviter stipitata, dorso 
usque ad medium partis femineze spathe adnata, clavata, pars mascula parti femineze 
| pæne zequierassa. Synandria dense aggregata. Ovaria omnino libera. 
Genus cum Caladio, Vent., et Seapispathá, Brongn., componenda, ab illo distans habitu 
et ovarii loculis monovulatis, ab hác imperfecte cognitá saltem ovario biloculari, loculis 
monovulatis, et stigmate lato truncato nec parvo et capitato. 
APHYLLARUM TUBEROSUM (sp. nov.); bulbo 3:0 em. long., 2:0 em. diam., basi parce 
radicifero; pedunculo incrassato, ac reverá in sicco fere ad 0°5 cm. compresso, imà 
basi squamis parvis fragilibus bruneis instructo, ceterum nudo, cirea 40-0 em. alt. ; 
foliis ignotis; spathá 6*0—7:0 cm. long.; tubo 1:7 em. diam., virescente ; laminá vix 
usque ad 4-0 em. long., apice acutiusculá, lacteá, explanatá vix 3:0 em. lat. ; spadicis 
lactei stipite 0°3 cm. long.; parte femined 1:0 cm., parte synandrodigerá 1:8 cm., 
parte synandrigerà 2:0 cm. long., 0'5 cm. diam.; synandrodiis aggregatis, 0:15 em. 
long., 0:15-0:'2 cm. diam.; pollinis granis granulis cassis intermixtis; ovario 
ancipite, 01 em. long. 0:075 cm. lat.; stigmate 01 cm. diam., quam ovarium 
pius quam duplo brevius. 
Hab. Orescit juxta Santa Cruz, mens. Nov. spadices ostendens. (N. 678.) 
The scape, of which a diagrammatic section is shown at fig. 6 of the above Plate, 
consists of fundamental tissue traversed by vascular bundles, which are accompanied, as 
