52 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



(VOL. 10 



sepalis ea. 15, inferioribus jugatis, ovatis, 16-18 mm longis, superioribus subju- 

 gatis vel imbricatis suborbicularibus concavis, 18-22 mm longis, valde searioso- 

 marginatis; petalis 8, obovatis subunguiculatis, 4.0-4.5 em longis, 3.0-3.5 cm 

 latis, albis; staminibus in disco lato dispositis introrsis, exterioribus ca. 5 mm 

 longis, interioribus 8-10 mm longis, intimis saepe sterilibus; antheris subclavatis 



4- thecatis, poro subapicali laterali dehiscentibus ; pistillodiis minutis filamentis 

 nonnullis; inflorescentia foeminea uniflora; staminodiis planis, 5-7 mm longis, 



5- seriatis, in aimulo 2 mm alto dispositis; ovario 12-14-loculari ; frnctu ovato- 

 globoso, ca. 3 mm longo, 3 cm lato ; stylis liber is subfiliformibus, ca. 8 mm longis, 

 stigmatibns distalibus ventralibns obovatis, ea. 1.6 mm longis. 



Type : tree 15 m high, 30 cm diam., with scanty cream-colored latex ; petals 8, 

 white, fragile; styles 12-14, conspicuously elongate; sepals 12-15 imbricate, 

 investing fruit at maturity; frequent along streamside in mixed montane forest 

 below Camp No. I at 1500 m alt., Ilu-tepui, Edo. Bolivar, Venezuela, March 10, 

 1952, Maguire 33332 2 (holotype NY). 



Paratypes: tree 15 m high with scanty whitish thick latex; flowers conspicuous, very 

 fragrant, petals 8; stamens numerous, anthers bright yellow, at 1500 m alt., Ilu-tepui, March 

 10, 1952, Maguire 33383$ ; tree 10 m high, frequent, montane slopes at 2000-2300 m alt., 

 Ilu-tepui, March 16, 1952, Maguire 33438. 



This most attractive tree is presently known only from Ilu-tepui along the 

 Venezuela-British Guiana frontier. 



3. Clusia tabulamontana Maguire, Bull. Torrey Club 75: 420. 1948. 



Type; small branched tree to 5 m high, petals white, fragile, crimped and 

 erose along the margin, edge of Savanna V, Tafelberg, Suriname, Aug 16, 1944, 

 Maguire 24396 (holotype NY). 



Known only from Roraima sediments, Talefberg, Suriname, _ where the small 

 attractive tree is a prominent member of the cumbre flora. 



4. Clusia steyermarkii Maguire, sp. nov. Figure 9. 



Arbor parva; foliis coriaceis sessilibus oblaneeolatis, 25-30 cm longis, 7-8 cm 

 latis. apiee late obtuso, basi angustata alata ; inflorescentia foeminea (masculina 

 ignota) triflora, congestata terminali; pedunculo erecto, ca. 5 em longo ; sepalis 

 9, inferioribus late ovatis, 10-13 mm longis, 10-15 mm latis, obtusis, (4)-jugatis 

 decussatisque, superioribus (5) subimbrieatis vel imbricatis, late ovato-oblongis, 

 obtusis, 15-18 mm longis, 11-13 mm latis, scariosomarginatis ; petalis ignotis; 

 disco staminodiali ca. 1 mm alto, staminodiis 2-3-seriatis, linearibus, sterilibus. 

 4-6 mm longis ; ovario 12-loculari ; rostro stylari ea. 4 mm alto, stylis 12, partibus 

 liberis 4-5 mm longis, stigmatibus sessilibus, distalibus ventralibus, oblongis ca. 

 '4 mm longis; floribus masculinis ignotis. 



Fig. 8. a-e, Clusia phelpsiana$ . a, habit, fruiting specimen, X Vi ; b, view of calyx, from 

 below, X M> ; c, long-section diagram of $ flower (petals lacking); d, stylar apparatus; e, 

 staminodia, ventral and lateral views, X 5; drawn from Maguire 33332. f-h, Clusia phelpsi- 

 ana $ . f , habit, flowering specimen, X Vi g, exterior stamen, X 5 ; h, interior stamen, ventral 

 and lateral view, X 5 ; i, distal portion onf anther, lateral view, showing subterminal dehiscence, 

 X 20; j, cross-section diagram through subterminal dehiscence pores; drawn from Maguirr 

 33438. k-n, Clusia parvifolia $. k, habit, fruiting specimen, X 1; 1, female flower, X 1%; 

 m, mature fruit, X 1%; n, (probably fertile) staminodia ventral and lateral views, X 15. 



