1118 ADDITIONS AND CORRECTIONS 



Pa 56 



236 2a. P. mesochora Greene. Teukestrial Form: Stem decumbent 

 at the base, rooting, 2-5 dm. high, ghibrous or sparingly appressed-hirsute; 

 ochreae more or less apjiressed-pvibesoent or the lower glabrous, rarely 

 with a foliaceous border; jjotioles 1-2 cm. long, usually more or less his- 

 pidulous; leaf-bladcs linear-lanceolate or rarely lanceolate, 7-15 cm. long, 

 1.5-3 cm. wide, gradually tapering towards the apex, sparingly sh(jrt- 

 pubescent, or glabrous except on the midrib and the hispidulous-ciliolate 

 margins; peduncles 3-5 cm. long, usually hispidulous; racemes 3-5 cm. 

 long, a])out 1 cm. thick; bracts hirsute. P. nuROchora Nieuwl. Paludose 

 Form: Like the terrestial, but glabrous, sometimes even to the peduncles 

 and bracts. Aquatic Form: Stem floating and rooting at the nodes, 

 1-2 m. long, glabrous; petioles 3-5 cm. long, glabrous; leaf-blades lanceolate 

 or ovate-lanceolate, acute at the apex, truncate or cordate at the base, 

 5-12 cm. long, 2.5-4 cm. wide, glabrous; inflorescence as in the terrestrial 

 form, but the peduncles usually glabrous and the bracts always glabrous 

 (less common than the terrestrial). P. mesochora Greene (as to type). 

 Water and wet places: Me. — Minn. — w. Neb. — D. C. 



3. P. coccinea (Muhl.) Greene. Terrestrial Form: Stem erect, 3-10 

 dm. high, striate, glabrous or somewhat hispidulous; ochreae short, truncate, 

 short-hispidulous; leaf-blades ovate or ovate-lanceolate, 1-2 dm. long, 

 4-6 cm. wide, abruptly acuminate at the apex, acute to subcordate at 

 the base, sparingly short-hispidulous or nearly glabrous, except the his- 

 pidulous margins and veins; peduncles 1 or 2, glandular-hirsutulous, 

 2-5 cm. long; raceme linear, 5-8 cm. long, usually tapering upwards; 

 bracts glandular-hispidulous at the base and hispidulous-ciliate on the 

 margins, otherwise glabrous (common). Polygonum coccineum tcrrestre 

 Muhl. P. amphi'ium emersum Michx. P. Muhlenbergii S. Wats. Paludose 

 Form: Resemtiling the terrestrial, especially above, but often glabrous 

 up to the inflorescence, the bract glabrous, and the lower leaves like 

 those of the aquatic form. Aquatic Form : Stem floating and rooting, 

 1-3 m. long, glabrous, the nodes somewhat thickened; ochreae glabrous, 

 truncate; petioles 5-7 cm. long, glabrous; leaf -blades ovate or ovate- 

 lanceolate, acute at the apex, usually cordate at the base, 5-12 cm. long, 

 2-5 cm. wide, glabrous; inflorescence like that of the terrestrial form, 

 but the peduncles sparingly glandular or glabrous and the bracts glabrous 

 (rare). Polygonum coccineum aqualicum Muhl. Water and wet places: 

 N. S.— Man. (?)— Iowa— Mo.— Va.; Utah. 



3a. P. pratincola Greene. Terrestrial Form: Stem decumbent at 

 the base, 3-10 dm. high, thickened at the nodes, usually more or less 

 appressed-pubescent; sheaths truncate, appressed-hirsute; petioles 3-5 cm. 

 long, more or less hispidulous; leaf-bladcs ovate or ovate-lanceolate, ab- 

 ruptly acuminate at the apex, acute to sul)cordate at the base, equally 

 appressed-hirsutuious on both sides, S-15 cm. long, 3-5.5 cm. wide; ])ed- 

 uncles 1 or 2 (rarely 3 or 4), glandular-hispidulous; raceme 4-10 cm. long, 

 1 cm. thick or less; bracts hirsute throughout (common). P. prattncoln 

 Greene. P. sp"ctabilis, P. propinq^ia and P. Wardii Greene. P. rigidula 

 Nieuwl., not (Sheld.) Greene. Paludose Form: like the terrestrial but 

 glabrous or nearly so, the bracts only sometimes sparingly hirsute. 

 Aquatic Form: Unknown, unless represented by P. subcoriacca Greene. 

 Wet places and shallow water: Sask. — Wash. — Ore. — Utah — Mo. Jl-0. 



3b. P. vestita Greene. Terresti!ial and Paludose Forms: Stem de- 

 cumbent and rooting at the base, glabrous, 5-10 dm. high; lower ochreae 

 (on the part of the stem submerged or at some time having been sub- 

 merged) glabrous, the upper ones appressed-hirsute; petioles 1.5-4 cm. 

 long, usually more or less appressed-hirsutuious; leaf-blades ovate or 

 ovate-lanceolate, abruptly acuminate at the apex, acute or rounded, or 

 the lower cordate at the base, appressed-hirsutuious above, more densly 

 pubescent with finer hairs, almost silky canescent beneath, or the lower 

 ones growing in water glabrous; peduncles 2-4 cm. long, glandular-his- 



