MELASTOMACEAS 
ORDEM SYSTEMATICA 
Mierolieia humilis Naud. Ns. 1.828 
Colhida no Juruena. Florecendo em Maio de 1909, 
“ 
Microlieià euphorbioides Mart. var. parviflora Cogn. 
Ns, 1.944, 1.450, 1.459 e 1,456 
Colhida em Tapirapoan. Florecendo em Margo. 
Rhynchanthera riparia Spenc. Moore (1). 
Ns. 102, 1.673, 1.415 e 1.477 
Colhida em Tapirapoan. Florecendo em Margo de 1909. 
Siphanthera ramosissima Cogn. spc. nov. (Section Eusiphanthera) 
Herbacea pussilla, tota breviuscule subsparseque glanduloso-puberula ; 
caule gracillimo, fere usque ad basin trichotome ramosissimo ; foliis minutis bre- 
vissime petiolatis, ovatis vel ovato-oblongis, apice obtusis vel abrupte acutis, basi 
acutiusculis, margine obscure denticulatis, subtiliter trinervulosis ; floribus mi- 
nimis, subsessilibus, ad apices ramulorum laxe glomeratis rarius solitariis ; ca- 
lycis tubo campanulato, tenuiter 4 — costato, lobis triangularibus, acutissimis, 
tubo demidio brevioribus ; petalis obovatis, apice oblique subtruncatis ; antheris 
perfectis ovoideis non vel obcure rostratis, imperfectis anguste linearibus. 
Caulis erectus vel ascendens, obtuse tetragonus, 6 — 8 cm. longus, 1/2 — 
1 mm, crassus, ramis longiusculis, erecto-patulis, filiformibus, satis ramulosis. 
Folia patula, rigida, 2 — 4 mm. longa, 11/2 — 3 mm. lata. Calycis tubus basi 
obtusus, 2 mm. longus, apice 11/2 mm. latus ; lobi erecti, 1 mm. longi. Peta- 
la 2— 21/2 mm. longa. Antherae atropurpureae, apice pallidae. 3/4 mm. 
(1) Spc. Moore in 7rans. Linn. Soc. of London Ser. 2. Bot, IV p. 360 (1895). 
