BOTANY OF THE NORTHERN UNITED STATES. XCvii 



2*. A. pailicilluta, Decaisne. Almost glabrous; stems short, about % 

 foot high ; leaves alternate, short-petioled, elongated-oblong, l'-2' wide ; umbel* 

 several in a cluster, short-pcduncled ; flowers large (I' in diameter), green, with 

 a short purplish crown ; pods oblong-ovate, often bearing some soft spinous pro< 

 jections. Prairies, Illinois ( Vasey, Bebb), and southward. June. 

 P. 362. 



Corispermum tiyssopifoliuin, L. An annual, smooth or some- 

 what hairy, branching herb, with slender striate branches, narrowly linear thick- 

 ish leaves, the upper ones small and short, ovate-lanceolate, scarious-margined, 

 and forming the bracts of the slender spikes, a solitary and perfect flower sessile 

 under each one ; fruit round-oval, convex on the back, wing-margined, resem- 

 bling a small bug, whence the name of the genus. Sandy shore of Lake Mich- 

 igan, near Chicago, Dr. Scammon, and of Lake Erie, at Buffalo, G. W. Clinton, 

 (Adv. from the Northwest.) 



P. 378. 



11. Rumex Engclniaiiili, Ledeb. (R. hastulatus, Baldw., not of 

 Campd.), a dioecious species, with narrow and hastate leaves, or the lowermost 

 cordate, distinguished from no. 10 by its very simple panicle, and the valves of 

 the fruit enlarging and samara-like, occurs in S. W. borders of Illinois, thence 

 southward and westward. 



Bruniiichia cirrhosa, Banks, a Southern plant of this family, climb- 

 ing by tendrils, and with the fruiting calyx and its pedicel winged on one side, 

 is said by Dr. Bruendd to occur in S. Illinois. I have seen no specimen. 



P. 435. 



8 a . PotamogCton crispus, L. Leaves lance-oblong or oblong-linear, 

 wavy-crisped, obtuse, sessile, serrate, 3-nerved ; stems much branched ; spike* 

 long-ped uncled, few-flowered. Streams, Wilmington, Delaware, E. Tatnalt, 

 &c. Lchigh River, Pennsylvania, T. Meehan, and at Lancaster, Prof. Porter. 

 Abundant where it occurs ; probably indigenous ; flowering in May and June, 

 earlier than the others. (The remarks on p. 436 to be erased.) (Eu.) 

 P. 439. 



Sagittaria calycina, Engelm. Pedicels of the two kinds of flowers 

 of equal length, the fruit-bearing ones recurved; flowers polygamous, the sterile 

 es with a few rudimentary pistils and numerous stamens, their filaments 

 oothish, and about the length of the broadly ovate anthers, the fertile ones 

 ith 7 to 12 stamens ; style longer than the ovary and erect, but horizontal on 

 lunate or obovate narrowly-winged achenium ; sepals orbicular, strictly ap- 

 to the head of fruit. Kennebunk, Maine, Mr. Swan, growing under 

 ter, with no blade to the leaves, the petioles stout, subulate. Hackcnsack 

 marshes, New Jersey, C. F. Austin ; mostly with a small and halberd-shaped 

 emersed blade to the leaves. Wilmington, Delaware, E. Tatnall; the blade 

 rudimentary, or oblong and entire, or halberd-form or sagittate, short, obtuse. 

 Athens, Illinois, E. Hall, with well-developed sagittate acute leaves. Probably 

 not uncommon. 



