I'OLVCONACKi*:. (urtKWUKAT lAMIl.V.) 437 



triaugular. Embryo straicflit and axilo, witli foliaieous lotyleilons. — Anim- 

 als or pereunial.s, with radical or alteruate or whorleil entire leaves, without 

 stipules. (Name from ^piov, woul, and yivu, kiui.) 



1. E. ^nnuum, Nutt. Annual, erect, leafy, naked ahove, 2*^ high, white- 

 floccose-tomentose throughout; leaves ohlong-lanceolate, acute at huth ends, 

 short-petiolate, Hat ; bracts small, triangular ; involucres numerous in terminal 

 cymes, turbinate, shortly pedicelled, 1 - 1 V' long, very tomentoso ; fiowcrs 

 white, the outer sepals obloug-obovate, 1" long or less. — Central Kan. to ('..1.. 

 and southward. 



2. OXYRIA, Hill. MAINTAIN SORRKL. 



Calyx herbaceous, of 4 sepals; the outer smaller and spreading, the inner 

 broader and erect (but uncliaiiged) in fruit. Stamens 6. Stigmas 2, sessile, 

 tufted. Acheue lenticular, thin, Hat, much larger tlian the calyx, surrounded 

 by a broad veiny wing. Seed flattened contrary to the wing. Embryo straight, 

 in the centre of the albumen, slender. — Low alpine perennial, witli round- 

 kidney-form and long-petioled leaves chiefly from the root, obliquely truncate 

 sheaths, and small greenish flowers clustered in panicled racemes on a slender 

 scape. (Name from 6^6$, sour, in allusion to the acid leaves.) 



1. O. digyna, Hill. Leaves all round-kidney -form, usually notehed at 

 the end; fruit orbicular. — Alj)iue region of the White Mts., and far north 

 and westward. (Eu.) 



3. RUM EX, L. Dock. Sorrkt.. 



Calyx of 6 sepals ; the 3 outer herbaceous, .sometimes united at ba.se, spread- 

 ing in fruit; the 3 inner larger, somewhat colored, enlarged after flowering 

 (in fruit called valves) and convergent over the 3-angled achene, veiny, often 

 bearing a grain-like tubercle on the back. Stamens 6. Styles 3 ; stigmas 

 tufted. Embryo slightly curved, lying along one side of the all^umen, slender. 

 — Coarse herbs, with small and homely (mo.stly green) flowers, which are 

 crowded and commonly whorlcd in panicled racemes; the petioles somewhat 

 sheathing at base. (The ancient Latin name; of unknown etymology.) 

 § I. LATATIIUM. (Dock.) Flotvers perfect or motmciouslij poli/f/amous ; 

 herbage not sour or scarcely so ; none of the leaves halberd-shaped. {Flower- 

 ing through the summer.) 

 * Perennials, \ -7° high, mostli/ with fusiform roots; valves not hearing bristles. 

 -4- Valves {large, 3" broad or more, thin) all naked or one with a small grain. 



R. rATiENTiA, L. (Patiknck Dock.) A very tall species, with ovate- 

 oblong and lanceolate leaves (broadest above the base), those from the joot 2- 

 S° h^ng, and one of the heart-shapo<l nearly or (piite entire valves (3" br<»ad) 

 bearini^ a small grain, or its mi. Iril) thickened at base. — N. Eng. and N. Y. 

 (Adv. from Eu.)^ 



1. R. venbsus, Fursli. Stems from running rootstocks, erect (l'^ high 

 or less), with consjticuous dilated .sti])ules; leaves on short but rather .slender 

 petioles, ovate or oblong to lanceolate (3-G' long), acute or acuminate, only 

 the lowest obtuse at base ; panicle nearly .sessile, short, dense in fruit ; valves 

 entire, glandlcss, broadly cordate with a deep sinus, 9-12" in diameter, bright 

 rose-color. — Sa.sk. to ceutral Mo. and Kan., and westward. 



