992 DICOTYL. skv EXOGENJE. MACARANGA. 
liber. Foliorum ambitus et nervatio pro speciebus satis constantes, in variis 
divisionibus varium modum sequentes et typum sectionalem variegatum con- 
stituentes. Flores masc. in axilla bractearum pulvinulos occupantes vulgo 
perexigui, sepissime 12-6-andri, rarius hinc usque 20-andri v. illinc tantum 
5-3-andri imove 2-1-andri, habitu et structura ab iis sectionis sequentis haud 
distinguendi, szepius tamen staminibus paulo numerosioribus prediti et folia 
insuper minus coriacea. — Sectiones Eumappa et Adenoceras a cll. Reichenb. 
f. et Zolling. (ad characteres caeterum dignitate sectionali in Euphorbiacearum 
ordine carentes) stabilite, ex majore copia specierum hodie nec ex forma nec 
ex margine integro v. dentato v. pectina!o rec ex presentia aut defectu glan- 
dularum bractearum distingui possunt, in M. Javanica et aliis enim anibitus 
imo et margo bractearum valde variat. In M. Tanario insuper bractez glandulis 
non sunt omnino destitutae. Foliorum basis peltata aut obtusa aut cordata non 
iis certiorem przebet characterem pro coordinatione specierum ut e M. Javanica et 
M. Tanario clare patet. Quum hodie haud parva pars specierum unico tantum 
sexu cognita et bracteze haud raro omnino ignota sint, dispositionem specierum 
nonnisi quemadmodum artificialem, sed facilem, proponere possum. 
S 1. Folia ambitu lata, ultra medium (3-) lobata v. simul elobata, 
basi peltata v. cordata, longe petiolata. — Stamina 2-1, in 
M. cissifolia ignola. 
1* Stipulae reniformes. 
Q 9. M. PRUINOSA, stipulis late reniformibus rotundato-obtusis, limbo foliorum 
ultra medium divergenter 3-lobo, paniculis masc. pyramidalibus floribundis 
fomineis breviusculis, bracteis masc. oblongo-triangularibus inciso-lobatis 
foemineis integris, floribus masc. exiguis diandris, calyce fcem. repando- 
1 5-lobo, capsulis inermibus. ) In insula Sumatra, in prov. occident. Priaman 
et in insula Bangka (Teysmann! ex hb. Miq. in hb. berol. et in hb. DC.), et 
in prov. sumatrana australi Lampong (Zolling. n. 1811 Z! in hb. Hassk.). 
Mappa pruinosa Miq. Flor. Ind. bat. Suppl. Sumatra p. 457. Ramuli teretes, 
intense casio-pruinosi, glabri. Stipulee multo latiores quam longe, longitu- 
dine 5 mm. equantes, subventricose, coriacez, primum ferrugineo-tomen- 
tell, dein glabrescendo nigricantes v. infuscate, eas sectionis Pachystemonis 
' jn mentem revocantes. Petioli circ. 12 cm. longi, juniores cum costis costu- 
lisque pagine inferioris foliorum obscure ferrugineo-tomentelli, demum gla- 
brati et plus minusve glauco-pruinosi, evoluti limbum subzquantes. Limbus 
foliorum 10-25 cm. longus, zquilatus ac longus, basi late peltatus, subtus 
valide et dense reticulato-venosus et aureo-v. demum fuscidulo-glandulosus, 
supra glaber, subtus ferrugineo-rufescens, demum ferrugineo-cinerascens, in 
costis rufo-furfuraceo-hirtellus. Lobi laterales breviter triangulari-ovati, acuti, 
ierminali breviores. Costa secundaria vulgo ultrà marginem glanduliformi- 
producte. Panicule masc. petiolos paulo superantes, confertim ramos, 
utriusque sexus rufo-tomentellc. Bracteczv masc. in conulum oblongum superne 
plus minusve lexum, disposite, 3-4 mm. longae, margine radiatim undulato- 
costulata&e. Capsule tantum 4 mm. longs, didym:e, compresso-obovoidez , 
obtuse, inermes, leviter rufo-furfuracez et glàndulis lutescenti-cerinis ad- 
spersc.. Semina compressa, reticulato-venosa. (v. s.) 
2* Stipule ovate v. lanceolatze, haud refracta. 
Ó 10. M. BRYPOLEUCA, foliorum limbo profunde trifido subtus primum lacteo, 
stipulis demum induratis, paniculis axillaribus masc. longissimis floribundis 
ramis ipsis paniculiformibus, ramulis angulosis apice capitulifloris, bracteis 
florigeris late triangulari-ovatis concavis acutis parvulis utrinque regulariter 
9-12-dentatis circ. 12-floris, calyce masc. monandro irregulariter clauso 
superne obliquo fcemineo cupulari apice truncato-5-denticulato, ovario glabro, 
capsulis depresso-subglobosis, carpidiis dorso superne late glanduloso-biver- 
rucosis, seminibus alveolato-impressis. 5 In Sumatra (Teysmann!), in Borneo 
(Lowe ! in hb. Hook.) et in peninsula malaccana (Griffith n. 4715! in hb. 
Hook.), in Pulo Penang (Wall. n. 7806!). Mappa ? hypoleuca Reichenb. f. et 
