1166 



EUPATORIUM 



EUPATORIUM 



E. americanum, Hort.). Fig. 1434. Diffuse and often 

 decumbent herb, the slender round branches, petioles, 

 and pedicels finely glandular-puberulent: Ivs. triangu- 

 lar-ovate or rhombic-ovate, thinnish, slender-stalked, 

 taper-pointed, coarsely and sometimes unevenly cre- 

 nate-dentate, sparingly puberulent beneath: heads 

 pure white, ageratum-like, in close clusters. Mex. 

 B.R. 1723. Easy in pot cult, and not very tender, 

 flowering in late autumn or early winter. Cuttings 

 strike root readily. Var. fdliis variegatis, Hort. Lvs. 

 variegated. 



12. probum, N. E. Br. Very viscid like the preceding, 



Erobably more tender: Ivs. similar: heads decidedly 

 irger, ^in. diam. Peru. G.C. III. 7:321. Recom- 

 mended as promising and cult, in a few English con- 

 servatories. Apparently not yet in the trade. 



13. vernale, Vatke & Kurtz. (E. triste, Hort., not DC. 

 E. trieste, Hort.). Fig. 1434. Strong herb (slightly 

 woody in the wild), with hairy sts.: Ivs. oblong-ovate, 

 long-stalked, taper-pointed, serrate, finely hairy above, 





1435. Eupatorium pert oliatum. ( X Ji) 



paler and grayish velvety beneath, veiny, 3-5 in. long: 

 fls. bright white, the heads in an ample terminal 

 corymb; involucral scales long, narrow, green. Mex. 

 Gt. 22:750. Easy in pot cult, becoming popular for 

 cut-fls. 



14. glechonophyllum, Less. (Ageratum conspicuum, 

 Hort.). Low, branching half -shrub, very leafy: Ivs. 

 small, ^z-l (rarely 2) in. long, triangular-ovate, sharp- 

 pointed, bluntly few-toothed, thin and nearly glabrous, 

 on slender stalks: heads borne on threadlike pedicels in 

 small or medium-sized flattish clusters. Chile. Tender 

 greenhouse perennial, but flowering in the open the 

 first year if seeds are sown early. Closely related, if not 

 actually identical was the E. Haageanum, Regel & 

 Koern. intro. into European hort. in the middle of the 

 19th century (see Gt. 16, p. 260, t. 555, figs. 4-6). 



15. pazcuarense, HBK. Puberulent but not glandular: 

 Ivs. opposite, stalked, round-ovate, light green, 2-4 in. 



long, taper-pointed, sharply or bluntly toothed: heads 

 very numerous in a wide (3-10 in.) flattish corymb. 

 Uplands of Mex. Essentially herbaceous, 1-3 ft. 

 high. Recently intro. in cult, in S. Calif. Promising 

 for cut -fls. and as a window plant. 



16. glabratum, HBK. (E. elegans, Hort. E. lati- 

 fblium, Hort.). Fig. 1434. Shrubby, erect, with slen- 

 der hard glabrous brown sts.: Ivs. of firm texture 

 though scarcely leathery, small, lance-oblong or ovate- 

 oblong, tapering into a strong rather short petiole, 

 blunt or pointed, wavy-margined or small-toothed: fls. 

 (sometimes blush) in ascending cymose clusters, 

 together forming a long terminal leafy panicle. Uplands 

 of Mex. 



17. riparium, Regel. Fig. 1434. Diffuse, becoming 

 woody at base, 2 ft., the sts. slender, puberulent and 

 usually reddish : Ivs. opposite, long-lance-shaped, taper- 

 pointed and at base narrowed to a long petiole, prom- 

 inently 3-ribbed, toothed: heads in rather compact 

 long-stalked clusters. Mex. Gt. 15:525. Gn. 40, p. 

 134. Good winter bloomer. Best for florists. Readily 

 cult, in coldhouse. 



18. purpftreum, Linn. JOE-PYE WEED. Lvs. 

 whorled, commonly in 5's and 6's, oblong or lanceo- 

 late, taper-pointed, coarsely serrate: heads in large 

 compound clusters, pale purple or flesh-colored, rarely 

 almost white. N. Amer. Common and variable. 

 Tall, rank plant of low grounds (reaching 8-9 ft.), 

 good for bold effects in border or against shrubbery. 

 Var. maculatum, Darl. Of lower growth: Ivs. com- 

 monly in 4's, ovate-oblong, roughish-pubescent : heads 

 in smaller clusters, more deeply colored. Var. folidsum, 

 Fern. Similar but with the infl. surpassed by the 

 long upper Ivs. Var. amdfenum, Gray. - Still lower 

 (2 ft. high), smoothish: Ivs. sometimes merely opposite. 



19. cannabinum, Linn. HEMP AGRIMONY. Resem- 

 bling Joe-Pye weed in general habit and with similar 

 pale purple heads in terminal clusters: Ivs. opposite, 

 but deeply 3-parted in a manner to suggest verticillate 

 Ivs. Eu. Common. May be used like the preceding 

 species but less desirable. Thrives best in limy alluvial 

 soil. Eng. Bot. 6 : 428. The Asiatic E. Kirilbwi, Turcz., 

 is a very nearly related plant of lower growth (1-3 ft.), 

 with narrower (linear-oblong) coarsely toothed lf.- 

 segms., the lateral often much reduced. Strict herb 

 with dense terminal corymb of dull greenish purple 

 heads. Gt. 24:850. 



20. coelestinum, Linn. (Conoclimumcoeleslinum,'DC.). 

 MIST -FLOWER. Somewhat pubescent: Ivs. opposite, 

 stalked, triangular-ovate, somewhat cordate, thin, 

 coarsely toothed: heads as in Ageratum in compact 

 clusters, many-fld., light blue to violet. N. J. to Mich., 

 Kans., and southward. Perennial herb, late-blooming, 

 heliotrope-fld. Appropriate to low borders. 



21. perfoliatum, Linn. BONESET. THOROUGHWORT. 

 Fig. 1435. Hairy: Ivs. lance-oblong, the pairs united at 

 base about the St., wrinkled, remotely toothed or entire, 

 taper-pointed: heads in dense terminal compound 

 cymes. N. Amer., common in low rich soil. Stout, 

 slightly rank-smelling plant, 2-3 ft. high, long used in 

 domestic medicine and found in old gardens. Excellent 

 for striking effects, especially in low grounds. Fls. 

 grayish white or in a comparatively rare variety (forma 

 purpftreum, Brit.) bluish purple. In var. truncatum, 

 Gray, the Ivs. (at least the upper ones) are rounded or 

 truncate at the sessile base, not united about the st. 

 A peculiar form apt to be encountered occasionally in 

 large cultures. 



22. altissimum, Linn. Grayish green, downy, much 

 branched: Ivs. opposite, narrowly lance-shaped, taper- 

 ing to both ends, short-stalked, remotely toothed or 

 entire: heads only 5-fld. Pa. to Minn., Neb., and south- 

 ward. Tall, vigorous herb, 4-8 ft. high, in open places 

 and dry soil. Not very ornamental. See page 3568. 



