OF THE MATTO GROSSO EXPEDITION, 1891-92. 367 
position causes much compression of the internal phloém. The cortex is less volumin- 
ous than is that of the vegetable marrow, so much so that the outer bundles often run 
close to the sclerenchyme ring, which latter greatly resembles that of the vegetable 
marrow ; as is so frequently the case with Cucurbitacez, there are small sieve-tubes in 
the cortex; the collenchyme is but slightly developed. I have had no opportunity of 
examining the leaf-traces. 
CACTACEA. 
PERESKIA BLEo, DC. Prod. iii. p. 475. 
Hab. Ad Corumbá floret mens. Jan. (N. 955.) [Bras. Or., Nov. Granat., Amer. 
Centr., Mexico. | 
FICOIDE.E. 
MOLLUGO GLINOIDES, Cambess. in A. St.-Hil. Fl. Bras. Merid. ii. p. 171. 
Hab. Crescit in ripá fl. Paraguay inter Santa Cruz et Tres Barras. (N. 634.)  [Bras. 
Or., Cuba, Chili, Argentina.] 
GAMOPETA L Æ. 
RUBIACEZ. 
LADENBERGIA ($ CASCARILLA) CHAPADENSIS (sp. nov). ; ramis crassis, subobsolete tetra- 
gonis, sursum complanatis, obscure puberulis vel glabris, nunc fistulosis, nunc 
solidis; foliis modice petiolatis, late ovatis, obtusis, basi obtusis vel rotundatis, supra 
elaberrimis, subtus, preesertim secus nervos, piloso-puberulis, margine revolutis, 
obsolete undatis vel integris; inflorescentiá terminali, abbreviatá, subthyrsoideá ; 
bracteis exiguis, nunquam foliaceis; bracteolis binis minutis, sæpe diu persisten- 
tibus; pedicellis crassiusculis; ovario oblongo-turbinato, rufulo-tomentello ; alabas- 
tris superne angustatis ; calyce cupulari, usque ad medium 5-lobo, lobis ovatis, obtu- 
sissimis, obsolete puberulis; corollà floris longistyli tantummodo a nobis scrutati 
in lacineas lineares, obtusas, erassiuseulas, extus una cum tubo tomentellas divisa ; 
staminibus juxta medium tubum affixis ; antheris linearibus, obtusis, alabastri tubo 
duplo brevioribus: disco cupulari, saltem in sicco compresso; stylo alabastri tubum 
subzequante; capsulis linearibus utrinque parum angustatis, seepissime unilateraliter 
dehiscentibus; seminibus anguste fusiformibus, utrinque caudatis et plus minus 
erosulis, nucleo parvo elliptico. 
Hab. Crescit in cacumine montium Serra da Chapada, alt. cirea 700 met. super mare, 
mens. Aug. florens et fructificans. (N. 144.) 
Frutex altus (vel potius arbuscula ?), circa 3-metralis.  Ramuli 0:4-0-5 em. diam., cicatri- 
culis solezeformibus foliorum dilapsorum notati, cortice cinereo vel fusco, leviter 
striatulo obducti. Foliorum lamina usque ad 17:0 cm. long. et 12:0 cm. lat. (medio- 
eria vero 19:0x 7:5 cm.), coriacea, plerumque siccitate aliquanto rubescens, facie 
superiore polita, subtus pallidior; costee secundariw utrovis latere 6-10, plerumque 
subopposite et oblique insertze, primo fere rectc, sub margine arcuatim incurve, 
ibique plerumque parum prominulee, aliter una cum costá mediá eminentes; petioli 
