BOTANY OF THE NORTHERN UNITED STATES. XCV 



high), rather stout, hirsute ; leaves lanceolate, almost sessile (about 2' long and 

 ' wide) ; umbel solitary and terminal, peduncled, very many-flowered; divis- 

 ions of the greenish corolla oblong (2^" long), more than twice the length of the 

 calyx, several times shorter than the pedicels ; hoods of the crown sessile at the 

 base of the tube of filaments, strongly concave, oblong, erect, with the obtuse 

 apex somewhat spreading, equalling the anthers. Prairies of Wisconsin, Lap- 

 ham, Mr. Cornell. July. Intermediate in several respects between A. viridiflora 

 and A. longifolia ; having the sessile crown of the former, and flowers not larger 

 than those of the latter. Hoods more cucullate than those of A. viridiflora ; the 

 two small appendages within each, and the still smaller pairs of appendages 

 alternate with the hoods, more conspicuous than in the last-named species ; 

 otherwise very similar. Pollen-masses also thicker and less club-shaped. A. 

 longifolia is well distinguished by the raised crown, of broader hoods, much 

 shorter than the anthers, and by the thick and short pollen-masses. Should 

 Dr. Engelmann's surmise prove correct (as is most likely), this species will bear 

 the name of A. lanuginosa, Decaisne. 



2 a . A. fmiliculilta, Decaisne. Almost glabrous ; stems short, about a 

 foot high ; leaves alternate, short-petioled, elongated-oblong, 1' -2' wide ; umbels 

 several in a cluster, short-peduncled ; flowers large (!' 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. 



Corispcriiiuni liyssopifdlium, L. An annual, smooth or some- 

 what hairy, branching herb, with slender striatc 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 shores, Illinois (near 

 Chicago, Dr. Scammon, &c., Menard Co., E. Hall], and northwestward. 



P. 378. 



11. RlllilCX Engelllianili, 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 raid westward. 



Briliuiicllia cirrliosa, 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. Brundel to occur in S. Illinois. I have seen no specimen. 



P. 435. 



8 a . PotaillOg^tOll crisplis, L. Leaves lance-oblong or oblong-linear, 



wavy-crisped, obtuse, sessile, serrate, 3-nervcd ; stems much branched ; spikes 

 long-peduncled, few-flowered. Streams, Wilmington, Delaware, E. Tatnall, 

 &c. Lehigh River, Pennsylvania, T. Mcehan ; Susquehanna, at Lancaster, Prof. 



