1338 APPENDIX 



2. Anincus pub^scens Rydb. Plants 2 m. tall or less, decidedly pubescent: 

 leaflets ovate, 3-10 cm. long, short-acuminate, singly or doubly serrate, pubescent 

 beneath: sepals of the pistillate flowers triangular-lanceolate, acute: petals of the 

 staminate flowers slightly over 1 mm. long, scarcely narrowed at the base: follicles 

 ovoid, sometimes appearing oblong when dry, the body about 2 mm, long, with the 

 slender beak mostly spreading. 



In woods, Iowa to West Virginia and Oklahoma. Spring and summer. 



3. Aruncus Allegheni6nsis Eydb. Plants 2.5 m. tall or less, glabrous or 

 nearly so at maturity below the inflorescence: leaflets ovate to oblong, 3-10 cm. long, 

 short-acuminate, doubly serrate, glabrous or with scattered hairs beneath: sepals of 

 the pistillate flowers deltoid or ovate-deltoid, acute or acutish: petals of the staminate 

 flowers about 1 mm. long, not narrowed at the base: follicles oval, sometimes appear- 

 ing ovoid when dry, the body about 2 mm. long, with the slender beak mostly erect. 



In woods, Pennsylvania to Georgia, Alabama and Kentucky. Spring and summer. 

 Page 519, after Eubus rubrisetus, insert: 



6a. DALIBARDA L. 



Perennial unarmed creeping herbs. Leaves alternate: blades broad, toothed, 

 long-petioled. Flowers of 2 kinds, some petaliferous, but usually sterile, on long 

 erect peduncles, others apetalous and fruit-producing on short curved peduncles (not 

 further considered here). Sepals 5 or 6, the 3 larger ones, at least, toothed at the 

 apex. Petals mostly 5, white, deciduous. Stamens numerous. Pistils 5-10: style 

 terminal. Drupelets nearly dry, the cluster enclosed in the persistent calyx. — Differs 

 from Bitbus in the few carpels which are clustered in the bottom of the hypanthium. 



1. Dalibarda ripens L. Stem and branches soft -pubescent : leaf -blades ovate 



to orbicular, 2-5 em. wide, crenate, pubescent on both sides, cordate, slender-petioled : 



sepals 6-7 mm. long, pubescent : petals oblong, oval or ovate, 7-8 mm. long : drupelets 



oblong to ovoid, 3-4 mm. long. 



In woods. Nova Scotia to Ontario, New Jersey and Minnesota, and in the mountains 

 to North Carolina. Spring to fall. 



Page 520, after Fragaria Virginiana, add: 



3. Fragaria Gray^na Vilmorin. Eootstock short and strong. Eunners stout: 

 leaves mostly erect; petioles 5-20 em. long, hirsute; leaflets 3, the blades obovate, 

 3-10 cm. long, coarsely serrate, evidently stalked: scape usually 1-2.5 dm. tall, 

 hirsute, many-flowered : sepals and bractlets lanceolate or linear-lanceolate, the sepals 

 usually the broader: corolla 1.5-2 cm. wide; petals suborbicular : fruit subglobose, 

 about 1.5 cm. in diameter: achenes in pits. — Differs from F. Virginiana in the hirsute 

 pedicels. 



In dry grounds, Indiana to Missouri, Alabama and Louisiana. Spring. 



Page 522, in fourth and fifth lines of the key under Geum, interchange the words 

 "glabrous" and "bristly." 



Page 526, after Sanguisorba Canadensis, insert: 



19a. POTERIDIUM Spach. 



Annual or biennial caulescent herbs. Leaflets with pectinate-pinnatifid blades. 

 Flowers perfect, in dense oblong or ovoid peduncled spikes. Hypanthium urceolate, 

 4-winged. Sepals 4, green with white-scarious margins. Petals wanting. Stamens 

 2 or 4: filaments short. Pistils solitary: stigmas brush-like. Achenes included in the 

 dry 4-winged hypanthium. — Differs from Sanguisorba in having a tap-root, in the 

 brush-like stigmas and the pectinate-pinnatifid leaflets. 



1. Poteridium dnnuum (Nutt.) Spach. Plants 1-4 dm. tall, glabrous: leaflets 

 7-15; blades ovate to obovate, the segments linear or oblong-linear: spikes 0.5-3 cm. 

 long, green: sepals broadly oval or ovate, 2-2.5 mm. long: mature hypanthium ovoid, 

 2.5-3 mm. long, the wings thin. 



In dry soil, Kansas to Arkansas and Texas. Spring and summer. 



