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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



j. Leaf-blade widest at the middle. Caribbean Honduras, Guatemala, 



British Honduras. 33. S. blandum. 



jj. Leaf-blade widest below the middle. Coastal Venezuela. 34. S. lanceaefolium. 

 hh. Base of the leaf -blade obtuse. 



k. Primary lateral veins arising at an angle of ca. 45° ; spadix on a stipe 



1.5-3 cm long. Venezuela. 35. S. Icochii. 



kk. Primary lateral veins arising at an angle of ea. 60° ; spadix. 



subsessile. Costa Rica, Panama. 36. S. phryniifolium. 



Section 1. Spathiphyllum sect. Massowia (K. Koch) Engl, in DC. Monogr. 

 Phan. 3: 228. 1879. Figure 2 J. 



Massowia subg. Eumassowia K. Koch. Bonplandia 4: 11. 1856. 



Spathe generally flat, reflexed, and typically non-decurrent upon the ped- 

 uncle; perianth formed into a usually fleshy, 4-6-sided cup, apically truncate, 

 entire; pistil cylindric-obpyramidal, apically truncate or subtruncate and not 

 exceeding the perianth (sometimes attenuate and exceeding the perianth in 

 8. commutation ) . Plants of various sizes. 



Type species: Spathiphyllum cannae folium (Dryand.) Schott, Aroid. 1: 1. 

 pi. 1. 1853. 



Distribution : northern South America east of the Andes ; Pacifica. 

 1. S. cannaefolium (Dryand.) Schott, Aroid. 1: 1. pi. 8. 1853. Figure 4. 



Pothos cannae folia Dryand. Bot. Mag. 17: pi. 603. 1803. 

 Pothos cannaeformis H. B. K. Nova Gen. Sp. 1: 76. 1815. 

 Monstera cannaefolia Kunth, Enum. PI. 3: 61 (p.p.). 1841. 



Spathiphyllum candicans Poepp. & Endl. Nova Gen. Sp. PI. 3: 85. pi. 295. 1845. 

 Massowia cannaefolia C. Koch, Bot. Zeit. 10: 277-278. 1852. 

 Spathiphyllum bonplandii Schott, Oesterr. Bot. Wochenbl. 7: 158. 1857. 

 Anthurium dechardi Andre, 111. Hortic. 24: 28. pi. 159. 1877. 

 Massowia dechardi Koch, Gard. Chron. II. 10: 623. 1878. 



Spathiphyllum cannaeforme (Curtis) Engl, in Mart. Fl. Bras. 3 2 : 103. pi. 16, fig. 2. 

 1879-1882. 



Leaf-blade typically oblique, narrowly to broadly oblanceolate varying to 

 elliptic, 25-45 (-52) cm long and (5-) 8-16 (-24) cm wide, commonly widest 

 above the middle, the apex acute or acuminate, or broadly rounded and ending 

 in a deltoid cusp, the base mostly long-cuneate or simply acute ; primary lateral 

 veins many, close together, arising at an angle of 35-45° ; petiole equaling the 

 blade, 18-^0 (-59) cm long, prominently alate quite to the geniculum or less, the 

 wing apically auriculate, early deteriorating into fibrous remains on older leaves ; 

 geniculum (1.2-)2-3.5(-5) cm long. Peduncle mostly 1.5-2 times as long as 

 the blade, 35-70 (-100) cm long; spathe reflexed, typically lanceolate, varying 

 to oblong or elliptic, 10-22 (-28) cm long and 2.5-6.5 (-9) cm wide, the apex 

 short- to long-acuminate, the base commonly cuneate to somewhat obtuse, ± 

 clasping the peduncle or narrowed into a short handle, white above, green 

 below; spadix 4.5-12(-20) cm long, smooth, on a stipe 0.5-2(-3) cm long; 

 perianth formed into a fleshy, 4-6-sided truncate cup, nearly concealing the pistil 

 and stamens within ; pistil cylindric-obpyramidal, the apex truncate, the stigma 

 coronate; anthers exserted in anthesis; ovary 3(-4)-locular, the ovules ± col- 

 lateral, affixed on a sub-basal pad in each locule, varying from 6-2 in each of the 

 3 locules, totaling (24-) 19-6 ovules per ovary; fruiting spadix smooth; fruit 

 spheroid, the apex truncate ; seeds as many as the ovules, mostly irregularly 

 ovoid and very angular, to 3.5 mm long and half as wide, the surface furrowed 

 and foveolate, especially on the outer face, the ridges irregular and verruculose. 



