1958] 



THE BOTANY OF THE Gl'AYAXA HIGHLAND PART III 



87 



spatulate, silky on the outer surface, sometimes with additional petal-like 

 staminodia ; ovary Mlocular, with 2 ascending ovules in each locule. 



VENEZUELA: Amazonas: Cerro Huachamaeari, Rio Cunucunuma, scrub forest near 

 summit camp, 1800 m elevation, Dec 10, 1950, Maguire et al. 30105 (MICH); same location, 

 right fork of Carlo de Dios above Summit Camp, elevation 1800 m, Dec 13, 1950, Maguire 

 et al. 30182 (MICH); Cerro Yapacana, Rio Orinoco, occasional in cumbre, elevation 1200 m, 

 Jan 3, 1951, Maguire et al. 30738 (MICH, type). 



This species is superficially very like 31. montana, of the Guianas; it differs 

 from that species, however, in the relatively narrower leaves which are narrower 

 at the base, in the somewhat stouter inflorescence with shorter pedicels, and in 

 the somewhat smaller flowers. Perhaps the most distinctive features of 31. ligus- 

 trina are in the hypanthium and calyx; the calyx is more nearly like that of 

 the genus Calyptranthes, with one large calyptra-like lobe and one or more small 

 lobes, whereas in 31. montana the calyx divides irregularly into lobes of more 

 nearly equal size; the staminal ring is glabrous in 31. ligustrina, but rather 

 coarsely bristly in .V. montana; the margin of the hypanthium is thin and revo- 

 lute, with reflexed calyx-lobes, in .1/. ligustrina, but in 31. montana the hypan- 

 thium and lobes are uniformly thick and tough with no apparent tendency to 

 become reflexed. 



In the following recent collection from British Guiana the flowers have the 

 tough irregularly dehiscent calyx and bristly staminal ring of 31. montana, but 

 the plants are otherwise indistinguishable from 31. ligustrina. 



BRITISH GUIAXA : Pakaraima Mountains, Imbaimadai Savannas, Upper Mazaruni 

 River, elevation 550 m, Oct 22, 1951, Maguire and Fanshawe 32179 (MICH). 



30. Marlierea macrophylla Amshoff, Rec. Trav. Bot. Neerl. 42: 2. 1950. 

 For description see Amshoff, I.e. Known only from British Guiana. 



31. Marlierea maguirei McVaugh, sp. nov. 



Frutex 1-3 m altus. pubescens, ramulis alatis, foliis lanceolatis vel anguste 

 elliptieis 2.5-6 cm longis. 4-9-plo longioribus quam latioribus, petiolis 1-2 mm 

 longis; nervo medio impresso ; foliis supra impresso-punctatis ; paniculis axillari- 

 bus binis, e nodis infimis rhachis abortivae lateraliter oriundis ; fructu subgloboso. 

 hypanthio calyceque coronato; calycis lobis 4. ovatis, obtusis. 1-1.5 mm longis, 

 maturitate inter se disjunct is. 



Shrub 1-3 m high, with pubescence of the sect. Myrciopsis; wings of the 

 branchlt-ts up to 0.5 mm high; leaves lanceolate or narrowly elliptic. 3-16 mm 

 wide. 2.5-6 cm long, 4-9 times as long as wide, attenuate, or bluntly acuminate, 

 narrowed from below the middle to just above the base, where abruptly con- 

 tracted and the margins decurrent on the channeled petiole 1-2 mm long; mar- 

 ginal vein 0.3-0.8 mm from the margin; axillary paired panicles 1.5-4 cm long, 

 with up to 15 flowers each (usually 3-5) ; buds and flowers not seen; fruit orange 

 (Maguire), 6-8 mm in diameter. 



VENEZUELA : Amazonas: Cerro Yutaje, Rio Manapiare, stream bed among boulders, 

 right branch of Cafio Yutaje, 1400 m elevation, Feb 9, 1953, B. $ C. K. Maguire 35114 (MICH, 

 type") ; same locality, elevation 1500 m, Feb 21, 1953, Maguire 4' Maguire 35353 (MICH). 



Distinguished from 31. karuaiensis only by the much narrower and lanceolate 

 rather than elliptic leaves, and by the presence of pubescence. Both species are 

 to be assigned without question to sect. Myrciopsis, q.v. above under 31. bipennis. 



32. Marlierea montana (Aubl.) Amshoff, Rec. Trav. Bot. Xeerl. 39: 147. 1942. 

 Eugenia montana Aubl. PI. Guiane Fr. 1: 495. pi. 195. 1775. 



