Monographs Details: Myrcia pyrifolia (Desv. ex Ham.) Nied.
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 - Venezuela. Bolivar: Rio Carrao, alto Caroni, alrededores Salto Hacha,6°15'N, 62°51'W, elev 350 m. Mar 1954 (bud), Cardona 2874 (US); de Botanamoa Corumo, 17 Dec 1959 (fl), Bernardi 8045 (NY). BRITISH GUIANA. CorentyneRiver, Jenman 238 (P). S U R I N A M E . Nassau Mts., Marowijne River, elev 400-550 m, 3 Jan 1955 (fl). Cowan & Lindeman 39092, 39098 (both M I C H ) , elev 525m, 1 Mar 1955 (imm fr), Maguire 40732 ( M I C H ) ; on the right branch of the CoppenameRiver, ca 4° 10' N, 56°20' W , 14 M a y 1963 (bud), Wessels Boer 1380(MICH, U ) ; IMaratakka River, 20 k m S of Saparra Creek, 24 M a y 1965 (bud),Maas {LBB 10859) (MICH, U ) ; Rijsdijkweg, ca 25 k m S of Paramaribo, 26 Aug1953 (bud), Lindeman 4605 (MICH, U ) ; near the airfleld on the Oelemari River,3°6' N, 54°33' W , 19 IMar 1963 (fr), Wessels Boer 996 (MICH). F R E N CHGUIANA. Maroni, Dr. Rech in 1862 (P); (Acarouany) Karouany, Sagot 1215 (P,M I C H , W ) ; in sylvis fluvii Kourou, Richard (P, det. by Berg). COLOMBIA.Amazonas-Vaupes: Rio Apaporis, raudal de Jirijirimo, elev 270 m, 15 ]\Iar 1952(imm fr), Schultes & Cabrera 15935 (MICH). BRAZIL. Amazonas: Rio Cauabury,Cachoeira Caranguejo, 16 Dec 1930 (fl). Holt & Blake 534 ( N Y ) ; Rio Negro, Ilhade Jerusalem, near mouth of Rio Cauabury, 18 Dec 1930 (bud), Holt & Blake 558(NY); [Rio Negro], Schomburgk [964?] (CGE); Regiao de Parintins, Lago doJurute, 1 Jan 1957 (imm fr), Froes 33063 (MICH). Para: Vigia, campina do Palha,30 Dec 1965 (fl). Black & Wurdack 18952 (MICH); Ilha de Colares, Mpio. de

Discussion:

Eugenia pyrifolia Desv. ex Ham., Prodr. Fl. Ind. Occ. 44. 1825.

Myrcia divergens D C , DC. Prodr. 3: 245. 1828.

Aulomyrcia pyrifolia (Desv. ex Ham.) Berg, Linnaea 27: 44. 1855.

Aulomyrcia pyrifolia a robusta Berg, Linnaea 27: 44. 1855.

Aulomyrcia pyrifolia fi gracilis Berg, Linnaea 27: 45. 1855

For description and additional synonymy see Amshoff (Fl. Suriname 3(2): 73. 1951). In the Guianas and eastern Brazil there are several species that superficially resemble this one in having reddish pubescence, the flowers more or less pubescent on the outer surface, the midvein convex or flat (or at least not impressed) on the upper leaf-surface, and the hypanthium prolonged and glabrous within. According to the system adopted here, some of these are referred to sect Aulomyrcia because the calyx-lobes are almost unchanged and persistent at anthesis; among such species are Myrcia. pyrifolia, and also M . cuprea, distinguished by its very abundant silky coppery pubescence and its trilocular ovary. Also very like M . pyrifolia are M. rufipila and M . subobliqua, both of which are here assigned to sect Armeriela. The differences between M . pyrifolia and M . rufipila are stated in the key to sect Aulomyrcia. In M . subobliqua the calyx-lobes are usually 4, low and much wider than long, pubescent on the inner surface, the long-turbinate hypanthium strongly revolute and at least the 2 larger calyx-lobes becoming detached. Admittedly the differences between sect Armeriela and sect Aulomyrcia are here subjective ones; study of more and better material of all these species may bring about changes in the limits recognized for them.

The type of Eugenia pyrifolia, which I studied at P in 1965 and 1966, is shown in Field Mus. neg. 37004. I have not seen the type of Aulomyrcia pvrifolia a robusta, Poiteau sn, which Berg saw "in hb. Kunth"; I assume that'this has been destroyed. The type of /3 gracilis, Rob. Schomburgk 964, I have seen at W ; it is named by Berg, and is also represented by Field Mus. neg. 31494; isotypes are at BM, G, and K. All these specimens I take to represent the same species.

Distribution:Venezuela South America| Guyana South America| Suriname South America| French Guiana South America|