APPENDIX 1331 



2. Dioscorea glauca Muhl. Eootstocks stout, over 1 cm. thick, often forked 

 and with many short stout lateral branches: lower petioles densely pubescent at the 

 apex: leaf -blades ovate to orbicular-ovate, or rarely ovate-lanceolate, usually larger 

 than in D. quaternata, sometimes undulate, glaucous and usually finely pubescent 

 beneath: staminate sepals oval: pistillate racemes few-flowered: fruits few, suborbie- 

 ular to broadly obovate or obreniform, 2-3.5 cm. long. 



In thickets and rich woods, Pennsylvania to Missouri and South Carolina. 



3. Dioscorea villosa L. Rootstocks slender, elongated, rarely forked, with few 

 more slender lateral branches: stem glabrous: leaf -blades broadly ovate or orbicular- 

 ovate, more or less pubescent beneath or sometimes glabrous : pistillate racemes many- 

 flowered: fruits numerous, suborbicular, varying to orbicular-obovate or obrenifornij 

 2 cm. long or less. 



In moist thickets and woods, Massachusetts to Minnesota, New Jersey and Texas. 



4. Dioscorea hirticaulis Bartlett. Rootstocks very slender and usually simple, 

 bearing more slender short lateral branches: stem pubescent: leaf -blades broadly 

 ovate, densely pale-pubescent beneath: pistillate racemes few-flowered: fruits few, 

 broadly obovate or deltoid-obovate, about 2 cm. long. 



In low thickets and swamps, coastal plain, North Carolina to Georgia. 



5. Dioscorea Floridana Bartlett. Rootstocks not seen : stem glabrous : leaf - 

 blades broadly ovate to ovate-hastate, decidedly acuminate, green, but paler beneath 

 than above, glabrous: staminate panicles clustered often greatly elongated: pistillate 

 racemes few-flowered: fruits few broadly obovate to suborbicular, about 2 cm. long. 



In moist thickets, South Carolina to Florida. 



Page 297, for ' ' attentuate " in third line under Sisyrinchium capillare, read, 

 ' < attenuate. ' ' 



Page 342, after Salix interior, insert: 



12a. Salix Thurberi Rowlee. A slender shrub, or a small tree, with finely silky 

 twigs. Leaf -blades linear to narrowly linear-lanceolate, 3-8 cm. long, mostly less 

 than 3 mm. wide, evenly denticulate, silvery silky, glabrescent, without stipules: 

 aments on long leafy branchlets, the staminate 1-2 cm. long, less than 1 cm. thick; 

 bracts lanceolate, copiously pubescent: capsules silvery silky-pubescent. Differs from 

 S. interior in the elongate leaf -blades, the single gland in the staminate flower and 

 the silky capsule. 



Along streams, southern and western Texas and adjacent Mexico. All year. 



Page 346, after Alnus rugosa, insert: 



12. Alnus maritima (Marsh.) Muhl. A small tree. Stem with spreading 

 branches, the twigs glabrous, at least at maturity: leaf -blades oblong or elliptic, 

 varying to ovate or obovate, 4-10 cm. long, mostly acute at both ends, sharply serrate, 

 usually cuneate at the base, shining above, dull and paler beneath; petioles mostly 

 1-3 cm. long: staminate aments appearing long after the leaves; bracts orbicular- 

 ovate, acute: pistillate aments developing into oval or ovoid cones 2-2.5 cm. long, the 

 bracts flabellate, crenate: nuts orbicular-obovoid 3-4 mm. long, margined. Differs 

 from A. rugosa in the larger cones with their broader bracts and the late-appearing 

 flowers. 



Along streams and in wet soil, Maryland, Delaware and Oklahoma. Late summer 

 and fall. 



Page 351, under Quercus Catesbaei; the cup of the acorn is sometimes nearly or 

 quite turbinate. In the key, this species should also be contrasted with Q. Texana 

 and Q. coccinea. 



Page 351, after Quercus coccinea insert: 



15a. Quercus borealis Michx. f. A large tree, commonly 20 m. tall. Leaves 

 similar to those of Q. rubra; blades 7-13-lobed to the middle or beyond it, somewhat 

 lustrous and deep green above, dull, paler and glabrous or nearly so beneath: acorn 

 resembling that of Q. coccinea, about \ as large as that of Q. rubra, short-peduncled; 

 cup turbinate, its scales appressed; nut ovoid, commonly about 2 cm. long, between 

 twice or thrice as long as the cup. Differs from Q. coccinea in the less deeply lobed 

 leaf -blades and the more shallowly turbinate cup of the acorn. 



In woods and on open slopes, Quebec and Ontario to the mountains of North Carolina. 

 GRAY OAK. 



