Monographs Details: Eugenia prosoneura O.Berg
Authority: Maguire, Bassett. 1969. The botany of the Guayana Highland-part VIII. Mem. New York Bot. Gard. 18: 1-290.
Family:Myrtaceae
Description:Distribution and Ecology - BRAZIL. Amazonas: Rio Tefe, Muguenitaua, 9 Jun 1950 (bud), Froes 26164( M I C H ) ; Rio Manacapuru, Rodrigues 450 {INPA 5329) ( M I C H ) ; Rio Negro,Padauiry, Uacuacu, 2 Oct 1947 (fl), Froes 22507 ( M I C H ) ; Rio Negro, Padauiry,Marara, 4 Oct 1947 (fl), Froes 22512 (MICH). V E N E Z U E L A . Amazonas: AlongRio Casiquiare near Solano, elev 100 m, 9 Jul 1959 (fl), Wurdack & Adderley 43364(MICH). Bolivar: Orhlas del rio Caroni, cerca de los raudales IMureyema, elev 740m, 9 Oct 1946 (fl), Cardona 1805 (NY). S U R I N A M E . Along Tapanahoni River,3°20' N, 55°27' W , 13 Apr 1963 (fl), Wessels Boer 1247 (MICH, U ) ; along OelemariRiver, 3°6' N , S4°33' W , 27 Mar 1963 (bud), Wessels Boer 1133 (MICH, U ) ;Bakhuis Mountains, on the left branch of the Coppename River, 3 Feb 1965 (fr),Florschiitz & Maas 2729 (MICH, U ) , 6 Feb 1965 (fr), Florschiitz & Maas 2765(MICH, U).

Discussion:

For description see Field Mus. Publ. Bot. 13(4) [Fl. Peru]: 722. 1958. The type came from "prope San Carlos ad flumen Rio Negro Brasiliae borealis," Spruce 3112 ("in herb. Mart."). On the type-collection and most other specimens from the Rio Negro and the upper Amazon, the leaves are nearly glabrous beneath at maturity; the larger calyx-lobes are 3.5-4.5 m m long, and all the calyx-lobes are always glabrous or essentially so within. In an occasional specimen, e.g., Froes 22512, the leaves are hirsutulous on the veins beneath, and sparingly hispidulous on the surfaces between the veins; in this same specimen and in Froes 22507, the flowers are almost twice as large but otherwise similar. In the specimens from Suriname, and in Cardona's plant from Bolivar, the caljoc-lobes are densely pubescent on both surfaces, and the flowers are relatively large (the calyx-lobes up to 6 m m long, the disk up to 4 m m wide). I believe that a single species, exhibiting considerable variation especially in the color and the amount of pubescence, is represented by ah these cohections.

The collections by Florschiitz & Maas seem to belong here; the fruit, previously undescribed for E. prosoneura, is black when ripe, ellipsoid, about 2 cm long

Distribution:Brazil South America| Venezuela South America| Suriname South America|