Monographs Details: Eugenia amshoffae McVaugh
Authority: Maguire, Bassett. 1969. The botany of the Guayana Highland-part VIII. Mem. New York Bot. Gard. 18: 1-290.
Family:Myrtaceae
Description:Species Description - A tree (?) 8 m high; branchlets, petioles and inflorescences hirsute-tomentose with pale reddish basifixed hairs mostly ca 0.5 m m long, these fading to ashy gray in age; leaves ovate, 9-12 cm long, 4-5 cm wide, about twice as long as wide, gradually long-acuminate at apex, rather broadly rounded at base, the sub-revolute margins scarcely decurrent; petiole about 4 m m long, 1.5-2 m m thick including the hairs; midvein elevated on the upper surface in a narrow median line, obscured most of its length by the matted hairs; lateral veins 5-8 on each side, impressed and somewhat persistently pubescent above, arcuate-ascending, scarcely forming a marginal vein; leaves glabrescent above except on the principal veins, thinly hirsutulous beneath with stout erect hairs, sparingly beset with convex glands; raceme axis 5 m m long or less, 2-8-flowered; pedicels 5-8 m m long in flower, subtended by minute deciduous bracts; bracteoles 1.5 m m long, narrowly triangular, distinct, hirsute, deciduous about as the flowers open; buds 7-9 m m long, pyriform, the hypanthium campanulate, 2.5 m m long; calyx-lobes 4, covering the corolla in bud, obtuse, boatshaped, glabrous within, 7 m m long, 5 m m wide, the inner ones a little flatter, all free to the base or nearly so and spreading-reflexed in the flower; disk about 2.5 m m wide, hirsute except for a central area 1 m m wide; style 9-12 m m long; stamens more than 200; anthers 1.3-1.5 m m long, the connective prolonged beyond this into a hnear gland-tipped point; petals 4, glabrous, "pale pink," 8-10 m m long; fruit unknown; ovary bilocular, the ovules 6-8 in each locule.

Discussion:

Acrandra guidanensis Amsh. Acta Bot. Neerl. 5: 279. 1956, non Eugenia guianensis Aubl. 1775.

Still known only from the type. BRITISH GUIANA. Tumatumari, dense upland forest, Jun-Jul 1921 (bud, fl), Gleason 446 (NY, type).

This species, assigned to Acrandra by Amshoff because of the narrow glandular tips of the anthers, seems otherwise to be out of place in that genus. As Berg defined Acrandra, it included three species, of which one was known only in fruit, and only doubtfully assigned to the genus. The other species, A. sellowiana Berg and A. laurifolia (Gardn.) Berg, were described and illustrated in the Flora Brasiliensis from flowering material and from specimens bearing partly or wholly mature fruits (Mart. Fl. Bras. 14(1): 459, 460. pi. 51, 52. 1857). These plants without any question are members of the Pimentinae; the inflorescence is a 3-flowered dichasium; the calyx is 5-parted; the ovary is 7-8-locular in one species and 8-9-locular in the other; the seeds are numerous, and the embryo is spiral. The hnear, gland-like tips of the anthers are well shown in the plates. In Acrandra guianensis, however, as Amshoff noted in the protologue, the plant in most respects suggests Eugenia; the flowers are borne on short racemes, on long individual pedicels; the calyx is 4-parted, suggesting that of E. feijoi and some related species; the ovary is bilocular; unfortunately mature seeds and fruits are unknown.

A specimen from another locality in the interior of British Guiana, this plant with immature fruit only, seems without question to represent, if not the same then a very closely related taxon. In almost all the details of leaf-size and shape, distribution of pubescence and morphology of flowers and inflorescence. Smith's collection is strikingly similar to the type of Acrandra guianensis. It differs, however, in having the branchlets and herbage, and the inflorescence, silky-tomentose with gray or white matted hairs up to 1 m m long; the midvein is smoothly convex, soon glabrate; the marginal vein is well-marked, 5-8 m m from the margin; the leaves are flat, obscurely dotted on both surfaces with small dark glands, thinly soft-tomentulose to glabrous beneath; flowers up to 6 pairs from spur-like shoots up to 5 m m long; pedicels 18-28 m m long; bracts linear, 3-4 m m long, soon deciduous; bracteoles evidently deciduous at anthesis, not seen; hypanthium and the erect calyx-lobes together 10-12 m m long after flowering, the lobes 4, ovate-triangular, 4-5 m m long, 4 m m wide at base, tomentulose on both sides; disk 5-7 m m wide, tomentose; fruit probably globose, up to 1 c m in diam when very immature, the flesh of the hypanthium becoming thick and woody; ovary bilocular, the ovules about 25 in each locule, radiating from an axile placenta; half-grown ovules with leathery integument and apparently undivided embryo.

BRITISH G U I A N A . Western extremity of Kanuku Mountains, in drainage of Takutu River, dense forest, elev 250 m, 4-22 Mar 1938 (imm fr). Smith 3120 (NY, U).

Although Gleason 446 and Smith 3120 very probably represent different species, almost unquestionably they represent the same genus. As the one is in flower and the other bears half-grown fruits, they cannot be compared directly, but the partly mature fruits and ovules of Smith's collection seem to be those of a member of the Eugeniinae, and I think it highly likely that Gleason's coUection also represents a species of Eugenia.