152 THE WATERLILIES. 



17, lanceolate; outer one 1.7 cm. wide, sepaloid on back, its margins petaloid; whitish 

 below, shading pink in upper two-thirds, to decided rose pink in uppermost I cm. ; 

 inner surface white in lower three-fourths, becoming rose pink at apex, and on mar- 

 gins for i to 2 cm. below apex ; inner petals white. Stamens about TOO, yellow ; outer- 

 most stamen has filament 4 mm. wide, 8 mm. long, anther 2.5 mm. wide at base, 19 

 mm. long, appendage 6 mm. long, i mm. wide at base, subacute. Stigma? Fruit? 

 Leaf ovate-orbicular, entire, 13 to 28 cm. long by 9 to 23 cm. wide, pelta 0.5 cm., green 

 above. Under surface purplish on margin, shading to green in the space of 3 to 4 cm., 

 spotless. Primary veins 8 on each side, length of principal area : radius = 7.7 cm. : 

 10.2 cm. 



GEOGRAPHIC DISTRIBUTION. Central and Southwest Africa. 



TYPES. Coll. H. Baum, Reise nach Slid- West Afrika, Kunene-Zambesi Expedi- 

 tion, No. 395, Nov. 9, 1899, "am Kubango unterh. der Kueio, 1120111. ii. M." Native 

 name " Amavu." In hbb. Delessert, Berlin, British Museum. Gilg (1903) adds, evi- 

 dently quoting Baum, " Bliithen weissblau. * ' f Blatter sehr diinn." The pink color 

 seen in the herbaria may therefore be due to changes in drying, as some other speci- 

 mens in this collection had undergone the same change. Professor Gilg also con- 

 siders Hopfner's No. 36 from Mossamedes (in hb. Berlin) to be identical with Baum's 

 395. A specimen in hb. Kew, coll. F. D. & E. J. Lugard, Sept., 1896, Botletle River, 

 Ngamiland, Tropical Africa, appears to be the same, as also one, coll. W. P. Johnson, 

 Lake Nyassa, in hb. Kew. Baum's No. 208, Oct. 4, 1899, " an ruhigen Stellen im Oka- 

 chitanda bei Kassinga, 1290 m. ii M., am Uferrand und in Einbuchtungen des Flusses, 

 auch in der Mundung und in Pfannen hinter Kassinga" (Gilg 1903), has smaller leaf 

 and flower, but more numerous floral organs. Leaf 16 cm. long by 13.5 cm. wide; under 

 surface deep red-purple. Petals 20 to 26, stamens 115 or more. In hbb. Berlin, Deles- 

 sert, British Museum. No. 396 of Baum, from the same locality as 395, is smaller than 

 the latter, but doubtless of the same species. Flowers rose color ; petals 1 1 to 14, 4 to 

 4.5 cm. long; stamens more than 50. Leaves very dark purple beneath. In hbb. Deles- 

 sert, Berlin. Professor Gilg (1903) considers Fischer's No. 4 (in hb. Berlin) from the 

 African lake region between Magu and Kagehi to be identical with the foregoing. We 

 place here also a specimen in hb. Kew, coll. A. Carson, 1891, at Karonga, Nyassa, hav- 

 ing flowers 10 cm. across, deep blue ; petals elliptic-lanceolate, stamens stout ; leaf oval, 

 14 cm. long by 10 cm. wide, lobes acute, overlapping, margins wavy in lower half, under 

 surface dark red-purple. 



Var. tenuis Conard. 



Leaves nearly orbicular, 7.5 to 10 cm. long by 7 to 8.6 cm. wide, green above, dull 

 dark purple beneath ; primary veins 6 ; length of principal area : radius = 3.2 cm. : 3.8 

 cm. ; sinus lobes slightly diverging or overlapping, obtuse, margins nearly straight. 



Flower 9 to 13 cm. across; petals and sepals very narrow (e. g., sepal 5.75 cm. by 

 i cm.; petals 5.4 cm. by 0.8 cm., 5.1 cm. by 0.85 cm.). Sepals 4, green outside, with 

 numerous black spots ; margin red-purple; inside white. Petals 14 to 17, 3.5 to 5.4 cm. 

 long, white or pale blue, rounded at apex. Stamens 33 or more, slender, yellow, the 

 outermost with filament 3 mm. wide and i cm. long, anther 7 mm. long, appendage 7 

 mm. long ; innermost stamen with filament 3 mm. long and 0.8 mm. wide, anther 3 mm. 

 long and 1.3 mm. wide, appendage 1.25 mm. long. Carpels 10. 



