104 THE JOURNAL OF BOTANY 
ASCLEPIADER, : 
Oxypetalum capitatum Mart. & Zucc. 686. Styles very thick 
and terminating in two short ovate fleshy lamella. Fournier gives 
the stigmas of this species as bilamellate, whereas Malme describes 
and figures them as semiterete, but I suspect.this difference to be 
merely individual. F 
Asclepias candida Vell. var. 658. Differs from the type In 
having the axial part of the upper edge of the corona-scales quite 
entiré instead of conspicuously toothed. The horned appendix — 
ascends so as to stand at an angle of about 120° with the axis 0 
the scale, instead of at right angles to it. But examination of a 
series of specimens would probably reveal intermediate forms. 
orrenia brachystephana Griseb. Porto Murtinho. 886. : 
~ Vincetoxicum (AmputstELMA) Roberti, sp. nov. Glaberrimum 
caule volubili gracili folioso foliis magna pro parte ex ramulis: 
revissimis oriundis sepissime pseudoverticillatis breviter sed clare 
petiolatis elongatis anguste linearibus acutis basi obtusis leviterve 
rotundatis marginibus revolutis, cymis brevipedunculatis plurifloris, 
pedicellis fl ini Jentibus, bracteis lineari-setaceis a pedi- 
cellis superatis, calycis lobis lineari-lanceolatis acutis quam corolle 
tubus longioribus, corolle rotate lobis ovato-oblongis obtuse acatis 
eestivatione levissime dextrorsum obtegentibus, corone phyllis in 
eyathum 5-undulato-lobatum basi gynostegio adnatum et huic fere 
equialtum connatis, corpusculis minutissimis, caudiculis horizon- 
talibus pollinia longitudine equantibus, stigmate vertice plano. 
Hab. Corumbé; December. 718. 
Folia sepius 4°5-6-0 cm. long. (juvenilia vero breviora), 0-1- 
0-2 cm. lat., graminoidea, in sicco late viridia, costa media s 
perspicua ; petioli 0-3-0-4 em. long. Pedunculi + 0-4 em. long:, 
cito decurvi. Pedicelli 0:15 em. long. Flores pansi 0-25 cm. dial 
Calycis et corolle lobi 0-1 em. long., hi 0-07 cm. lat., in sicco fus¢l. 
Corona circiter 0-03 em. gynostegium 0-04 cm. alt. Antherarum 
appendices rotundate, stigmati breviter impendentes, hoe 0°05 cm- 
diam. Pollinia pyriformia ; glandula minutissima. 
no nce by its long grass-like pseudoverticillate leaves, 
and the lobulate corona almost as long as the gynostege of its 
minute flowers. : 
I have followed Bentham in sinking Amphistelma in Vincetoxtcum, 
as I cannot see any essential difference between them, the 
Same applies to Orthosia as well. Malme also, to whom we cae 
some valuable recent work on this group, is not satisfied abou 
Orthosia and Amphistelma, although he does not solve the difficulty 
in Bentham’s way. 
GENTIANER, 
Irlbachia caerulescens Griseb. 609. 
BorraGine&. 
Heliotropium indicum L. 620. Terere, Paraguay. 850. 
H. inundatum Sw. Corumba. 787. Terere, Paraguay. 853. 
A, polyphyllum Lehm, Terere, Paraguay. 841. 
