1326 APPENDIX 



flowered: scales ovate, obtuse or acutish, about ^ length of perigynia: perigynia 

 broadly fusiform, acutely triangular, 4-4.5 mm. long, the sides 2 mm. wide, finely 

 many-nerved, the nearly straight beak 1 mm. long with entire orifice. [C. digitalis 

 glauca Chapm.] Differs from C. ptychocarpa in the very large leaves and much 

 larger perigynia. 



In shaded swamps, middle Florida. Spring. 



Page 215, after Carex ptychocarpa, insert: 



70a. Carex ebtirnea Boott. Leaf -blades capillary, 0.5 mm. wide, involute, ex- 

 ceeded by the scapes: scapes 1.5-3.5 dm. high, smooth: staminate spike sessile or 

 short -peduncled, 4-8 mm. long: pistillate spikes usually two, slender peduneled, 2-6- 

 flowered: bracts reduced to bladeless sheaths: scales whitish, obtusish or acutish, 

 narrower and shorter than the perigynia: perigynia elliptic, sharply triangular, 2 mm. 

 long, glabrate, obscurely nerved, tapering into the very short entire, narrow, but stout, 

 beak. 



In dry or rocky soil, usually limestone, Quebec to the Mackenzie, south to Virginia, 

 Tennessee, Missouri and Nebraska. Summer. 



Page 215, after Carex varia, insert: 



74a. Carex physorhryncha Liebm. Freely stoloniferous, the slender stolons 

 often 8 cm. long, very conspicuous. Scapes slender, 1.5-3.5 dm. high, reddened and 

 fibrillose at base, exceeding leaves: blades 1.75-2.75 mm. wide: lowest bract not 

 sheathing, from much shorter than to exceeding inflorescence: staminate spike sessile, 

 5-8 mm. long, 2 mm. wide: pistillate spikes 3-4, sessile and approximate, or the 

 lowest somewhat remote and short-peduncled : scales ovate, acute or short cuspidate, 

 purplish tinged: perigynia 2.5-3 mm. long, abruptly strongly stipitate, puberulent, the 

 body oval, abruptly contracted into a bidentate beak half its length [C. varia australis 

 Bailey]. Differs from C. varia in its elongated conspicuous stolons. 



In dry soil, South Carolina and Arkansas to Hidalgo. Spring and early summer. 



Page 218, after Carex Leavenworthii, insert: 



lOla. Carex mesochorea Mackenzie. Similar to C. cephalaphora. Leaf -blades 

 2.5-4 mm. wide: scapes usually 2-3.5 dm. tall, rough above, twice exceeding the leaves: 

 bracts awl-shaped, long-cuspidate: spikes densely aggregated into a short terminal 

 head, 10-17 mm. long, 10 mm. wide: scales ovate, cuspidate, slightly shorter to 

 slightly longer than perigynia: perigynia 3.5 mm. long, 2.25 mm. wide, nerveless on 

 inner face, the bidentate beak half the length of the ovate- orbicular body. Differs 

 from Nos. 100 and 101 in the longer scales and larger perigynia, and from No. 102 

 in the short head. The broad perigynia distinguish it further from No. 100 and the 

 broad leaf -blades from No. 101. 



In dry soil, District of Columbia to Tennessee, Missouri and Kansas. Summer. 



Page 218, under Carex Muhleribergii, omit reference to Carex Muhlenbergii 

 austrina and insert: 



102a. Carex austrina (Small) Mackenzie. Similar to C. Muhlenbergii in habit: 

 lower spikes distinct, but not separated: bracts broadly dilated at base: scales 

 (especially the lower in each spike) strongly awned, and exceeding and as wide aa 

 perigynia; perigynia ascending, 4 mm. long, 3 mm. wide. 



In dry open places, Missouri and Kansas to Texas. 



Page 219, after Carex sterilis, insert: 



104a. Carex incomperta Bickn. Scapes slender, sharply triangular, shorter or 

 longer than the leaves: leaf -blades usually less than 2 mm. wide: spikes 3-4, con- 

 tiguous or slightly separate, 4-5 mm. wide, with 6-15 spreading or retrorse perigynia : 

 terminal spike conspicuously staminate at base : scales ovate, acute to short-acuminate : 

 perigynia plano-convex, 3 mm. long, the body suborbicular, lightly nerved on inner 

 face, 2 mm. wide, round truncate at base, abruptly contracted into a beak one-third 

 to one half its length, its teeth prominent and suture on inner face conspicuous. 

 Differs from C. Atlantica in the slender sharply angled culms, narrower leaves, 

 sharper scales and lighter nerved perigynia. 



In swamps, Massachusetts to Georgia. Spring and summer. 



Page 219, after Carex Atlantica, insert : 



105a. Carex rosacoides E. C. Howe. Similar to C. interior. Leaves usually 

 shorter than the scape; blades 2-4 mm. wide: culms weak, 3-5 dm. tall; 



