So 



NYMPHAEACEAE. 



VOL. II. 



2. Castalia tuberosa (Paine) 



Greene. Tuberous White 



Water Lily. Fig. 1843. 



Nymphaea tuberosa Paine, Cat. PI. Oneida 



Co., N. Y. 132. 1865. 

 Castalia tuberosa Greene, Bull. Torr. Club 



15: 84. 1888. 



Rootstock thick, with numerous lat- 

 eral tuberous-thickened branches, which 

 become detached and propagate the 

 plant. Leaves orbicular, s'-i2' in diam- 

 eter, floating, sometimes slightly pubes- 

 cent beneath, green both sides, the veins 

 very prominent on the lower surface; 

 sinus open or closed; petioles stout; 

 flowers pure white, 4'-o/ broad, inodor- 

 ous or very slightly scented ; petals 

 oblong, in many rows, broader than those 

 of C. odorata, obtuse; fruit depressed- 

 globose ; seeds globose-ovoid, sessile, 

 longer than or about equalling the aril. 



Lake Champlain, west through the Great 

 Lakes to Michigan, south to Delaware and 

 eastern Nebraska and Arkansas. Summer. 



3. Castalia tetragona (Georgi) Lawson. Small White Water Lily. Fig. 1844. 



Nymphaea tetragona Georgi, Reise in Russ. 



Reichs, i : 220. 1775. 

 Castalia pygmaea Salisb. Parad. Lond. pi. 



68. 1807. 

 C. Leibergii Morong. Bot. Gaz. 13: 134. 



1888. 

 Castalia tetragona Lawson, Trans. Roy. 



Soc. Canada 6: Sec. IV. 112. 1888. 



Leaves floating, oval or oblong, 2'-^' 

 long, i'-3' wide, green above, green 

 or purplish beneath, the basal lobes 

 acute or rounded ; sinus open, narrow ; 

 petioles and peduncles nearly or quite 

 glabrous ; flowers white, inodorous, i'- 

 2' broad ; petals in about 2 rows, faintly 

 striped with purple, obtuse or acutish, 

 oblong or obovate, thin, about the length 

 of the sepals. 



In the Misinaibi River, Ontario (R. 

 Bell) ; in ponds along the Severn River, 

 Keewatin (J. M. Macoun) ; near Granite 

 Station, northern Idaho (Leiberg). Also 

 in Siberia, Japan and the Himalayas. 

 Summer. 



Family 29. MAGNOLIACEAE J. St. Hil. Expo?,. Fam. 2 : 74. 



MAGNOLIA FAMILY. 



Trees or shrubs with pinnately veined, alternate, entire or rarely lobed leaves, 

 large solitary flowers, and bitter aromatic bark. Sepals and petals arranged i: 

 3 or more series of 3's, hypogynous, deciduous. Stamens oo ; anthers adnate. 

 Carpels oo, separate or coherent, borne on the surface of the elongated receptacle, 

 ripening into an aggregate fruit composed of i-2-seeded dry or fleshy follicles or 

 achenes. Seeds i or 2 in each carpel ; endosperm fleshy ; embryo very small. 



About 10 genera and 75 species, of wide geographic distribution. 



Anthers introrse ; leaves entire, or with 2 basal lobes; carpels follicular. i. Magnolia. 



Anthers extrorse ; leaves lobed or truncate ; carpels samaroid. 2. Liriodendron. 



