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MEMOIRS QF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



2. Leaves conspicuously scarious-margined and apically aristate; sepals oblong, 



obtuse, strongly scarious-margined toward the apex, 4.0-5.5 mm long; internodes 

 of the branchlets 1-2 mm long; leaf -scars transversely linear. T. spectabilis. 



1. Inflorescence racemose or narrowly subpaniculate ; flowers white; veins departing 

 from the midrib at about 45°. 



3. Leaf -blades broadly oblanceolate, their dimensions exceeding 2 X 7 cm; in- 



florescence 20-40 -flowered. 

 4. Leaves subsessile or the petiole broad, 1 cm or less long, the apex of the blade 

 totally devoid of an arista ; inflorescence erect or ascending ; petals broadly 

 obovate, 16-18 mm wide, 20-22 mm long. T. spathulata. 



4. Leaves manifestly petiolate, the petiole 2-4 cm long, the apex of the blade 

 strongly aristate, the arista 6-12 mm long; inflorescence pendulous; petals 

 oblong-elliptic to oblanceolate, 5-8 mm broad, 14-18 mm long. T. pendula. 



3. Leaf -blades narrowly lanceolate, their dimensions 1.5 X 6.0 cm or less, strongly 

 aristate, the petiole slender, 1.2-1.8 cm long; inflorescence (l-)3-5-flowered. 



T. tremuloidea. 



1. Inflorescence a 1-3-flowered cyme, most commonly uniflorous. 



5. Sepals broadly obtuse; flowers 6-8 cm in diameter; leaves oblong-obovate, broadly 

 obtuse, obviously sessile, totally devoid of an arista ; branchlets relatively coarse, 

 2.5-4.0 mm diam. T. grandiflora. 



Fig. 25. Diagrammatic representation of leaves, sepals, and inner tangential view of 

 segment of the corona, consisting of primary staminodia, secondary staminodia, and stamen. 

 Aa-c, Tyleria floribunda; leaf, X 0.375; sepal, X 1-5; corona, X 1-5. Ba-c, T. grandiflora; 

 leaf, X 0.75; sepal, X 1.5; corona, X 1- Ca-c, T. linearis; leaf, X 0.5; sepal, X 1.5; corona, 

 X 1.25. Da-c, T. spathulata; leaf, X 0.25; sepal, X 1-5; corona, X 1.25. Ea-c, T. specta- 

 bilis; leaf, X 0.25; sepal, X 3; corona, X 2. Fa-c, T. aristata; leaf, X 0.375; sepal, X 0.5; 

 corona, X 1.5. Ga-c, T. tremuloidea; leaf, X 0.375; sepal, X 0.5; corona, X 1-5. Ha-c, T. 

 pendula; leaf, X 0.25; sepal, X 1; corona, X 2. 



