DR. WELWITSCH ON A SPECIES OF CISSUS. 77 
AMPELIDE. 
Sectio Tetrandr® quinquefoliolate. 
CISSUS MACROPUS, n. Sp. 
Arbor pygmza, 1-23-pedalis, tota succulenta. "Truncus bulbum ingen- 
tem, ovato-conicum apice bi- rarius tri-brachiatum mentiens, cortice 
levigato herbaceo-viridi et epidermate pergamentacea albo-badia tec- 
tum, lamellis epidermatis uti in Betula sensim sese decorticantibus. 
Radix e fibris longis, cylindricis, subsimplicibus constans. Rami breves 
j- usque 3-pedales, 2-4 pollic. crassi apice demum abrupte in ramulos 
circiter pedales, folis et floribus ornatos abientes. Cirrhos nullos 
hucusque observavi. Ramuli obiter striati, patentissimi et, uti folia 
atque petioli, villis albidis arachnoideis in juventute obsiti, demum 
glabrescentes, digiti crassitudine, et uti omnis planta succo aquoso 
scatentes. Folia (novella plicata albo-tomentosa) longe petiolata, in- 
fimum ramuh 3-, reliqua 5-foliolata, foliolis ovato-ellipticis vel obovatis, 
breviter petiolulatis, inzequaliter dentatis, utrinque arachnoideo-pubes- 
centibus, supremum, longius petiolulatum usque 4 vel 5 uncias lon- 
gum, infima basi inzequilateralia, reliqua basi plus minus subcordata. 
Stipule ad basin petioli bine, opposite, lato-lanceolatze, acuminate, 
deciduz. Pedunculi axillares vel abortu terminales, petiolorum cir- 
citer longitudine, leviter striati, patentes, petiolis tenuiores, dicho- 
tomo-ramulosi, ramulis oblique erectis corymbum latiusculum for- 
mantes. Flores 4-meri, ex flavo viridescentes, parvuli. Calyx bre- 
vissimus, obsolete dentatus, dentibus vix semper bene distinctis. 
Corolla tetrapetala, induplicato-valvata ; petala carnosa apicibus in- 
duplicatis, per paria coherentia, calyptratim decidua, apice valde 
cucullata, albida, sat fugacia. Discus valde evolutus, e tuberculis 
quatuor inter se distinctis columnaribus, apice oblique truncatis, 
ibidemque aurantiaco-glandulosis constans, post anthesin demum 
auctus. Stamina 4; antherz obovatz, incumbentes, luteole. Ova- 
rium ovatum vel ovato-conicum disci tuberculis superatum, biloculare. 
Stylus sub anthesi staminum longitudine, firmus, rectus, stigmate 
simplici (nee capitato!) terminatus. Fructum, quem nondum obser- 
vare mihi licuit, baccam esse dicunt, pisi mole, rubro-violaceum. 
Hab. Sporadica in rupestribus (subsalsis!) de Serra dos Montes Negros 
prope Mossamedes, nee non in montibus aridis de Giraul versus orien- 
tem ad 400 usque 600 ped. altit. super mare. 
Culta Olisipone floruit Apr. et Maio, quod est tempus autumni in ditione 
patrise, 
at the Royal Gardens, Kew, and will be published by Sir W. Hooker in the 
Botanical Magazine for 1864) and a dried flower of the plant described. 
H2 
