ADDITIONS AND COUBECTIONS. V 



4, very short : anthers globular. Style I, very short : stigma ovoid, entire. 

 Pod ovoid, a little flattened, notched at the apex, loculicidally 2-valved, 

 many-seeded. — A smooth, diffusely spreading and much-branched small 

 annual, with narrowly linear or awl-shaped leaves, connected at their base 

 across the stem by a slight stipnlar line ; the small flowers solitaiy and 

 sessile in the forks and at the ends of the branches ; corolla inconspicuous, 

 white. (Name altered from iroKvirpefivos, many-stemmed.) 



1. P. procumbens, L. — Dry fields, mostly in sandy soil, Virginia 

 and southward. June - Sept. 



Page 205, after Solidago nemoralis, add : 



2T. S. B&dllla, Nutt Stem and oblong or obovate-spatnlate leaves 

 rigid and very rough, not hoary, the upper sessile ; scales of the involucre 

 oblong, rigid ; rays 3 - 6 : otherwise much as in No. 27. — Dry hills, W. 

 Illinois and southwestward. 



Page 213. Xanthium spiii6sum should have been printed in small capitals 

 (as here), 'being an introduced species. 



Page 226, line 24 ; after " hemispherical " add : (merely convex in No. 1). 



Page 231, at the end of Senecio, add : 



# # # Bays present : root annual ; heads in a crowded corymb. 

 5. S> lobatus, Pers. (Butter-weed.) Glabrous, or loosely woolly 

 at first ; leaves rather fleshy, lyrate or pinnately divided ; the divisions 

 crenate or cut-lobed, variable. — Low banks of the Ohio and Mississippi, 

 Illinois, and southward. 



Page 231, line 2 from bottom, add : Lake Superior, Prof. Whitney. 



Page 234, line 1 1, add : W* Illinois and westward ; common. 



Page 268, lines 9, 10 from bottom, in place of " or terete," insert : flat or flattiah 

 and channelled above. 



Page 281, line 23, for " Lake Huron," read : Lake Michigan. 



Page 288, line 18, read : from Vermont and New Hampshire to Virginia and 

 southward, chiefly near the coast. 



Page 291, line 26, for "12-20-seeded," read ; 1-2-seeded. 



Pago 310, line 22, for "River-banks and plains," read: Oak-openings and woods. 

 Line 23, for " July," read : May, June. 



Page 352, line 2. Asclepias SuUivantii has scarcely sessSe leaves ; and the horns 

 of the hoods of the corolla are flat, broadly scythe-shaped, and abruptly acute. 



Page 352, after line 7, add : 



2'. A. Meddii, n. sp, Torr. Very smooth, pale; stem simple (1° 

 high), bearing a single terminal umbel (on a peduncle 3' long) ; leaves all 

 opposite, sessile, oblong, the upper ovate-oblong or somewhat heartshaped, 

 obtuse, raucronate, the plane (not wavy) margins and the numerous rather 

 slender pedicels downy when young ; divisions of the greenish-white corolla 

 oblong-ovate (4" long), half the length of the pedicel ; hoods of the slightly 



