88 PLANTiE WRIGHTIANiE. T. 



apparently two or three feet high. Leaves approximate, an inch and a half and on 

 the flowering branches an inch long, the largest half an inch wide near the base, 

 thence tapering gradually to the apex, entire, or the cauline obscurely denticulate ; 

 petiole one or two lines long. Heads barely two lines in length, in dense and more 

 or less pedunculate axillary clusters, the lower ones shorter than the leaves, the up- 

 per confluent into a thyreoid panicle. I am not acquainted with any species 

 with which this may be particularly compared.* 



257. CoNOCLiNiuM BETONicuM, J)C., var. ] iNTEGRiroLiuM : foliis lanceolato-oblon- 

 gis basi cuneato-contractis rarius subhastatis subintegerrimis utrinque cauleque mol- 

 liter pubescentibus. — Wet places on the Eio Grande, Texas ; Aug. — This could 

 scarcely be taken for the same species as De CandoUe's C. betonicum, which has 

 sagittiforra-cordate leaves ; but specimens gathered near Monterey by Major Eaton, 

 although they have barely subhastate leaves, tend to connect them. Dr. Gregg's 

 collection has the same plant, from Ojo Caliente, near Saltillo. The scales of the 

 involucre are about 25, hirsute on the back. Achenia glabrous. Receptacle 

 strongly conical. 



258. C. DissECTUM (sp. nov.): herbaceum, puberulum vel glabellum; caulibus erec- 

 tis ; foliis subsessilibus profunde 3 - 5-fidis partitisve, segmentis laciniato-pinnatifi- 

 dis ; involucri squamis circa 25 subbiserialibus subulato-lanceolatis dorso striatis pu- 

 bescentibus ; acheniis glabellis. — Damp places, Rio Seco, and on the Rio Grande, 

 Texas. — Stems one or two feet high from a perennial root, herbaceous, or some- 

 what lignescent at the base, slender, simple or branched, very leafy to near the sum- 

 mit. Leaves two inches or less in length, ovate in circumscription, all remarkably 

 laciniate-dissected, the lower less deeply than the upper ; the lobes lanceolate or 

 linear. Corymb nearly simple. Heads twice as large as in C. ccelestinum; the 

 flowers of the same color. Receptacle convex-conical. 



259. C. DISSECTUM, var. caule graciliore, foliis minoribus. — Valley beyond the 

 Pecos ; Aug. Also at San Antonio de las Alanzanes, near Saltillo, Mexico, Gregg. 



260. Trichocoronis rivularis. Gray, PI. Fendl. p. 66, adnot. " In the outlet 

 of a spring tributary to the San Felipe ; blooming profusely both above and beneath 

 the surface of the water. Flowers white." Also on the Rio Grande, Texas. In 

 the Hookerian herbarium are specimens gathered by Berlandier near Monterey. 



* A singular species of Eupatorium, on account of the foliaceous squarrose tips of the scales of its in- 

 volucre (which may be compared to that of Sericocarpus), is in Coulter's collection, both the Californian 

 and the Mexican. This and E. liatrideum, DC, which has the same peculiarity, should form a sepa- 

 rate section of the series Imbricaia : — 



Eupatorium sagittatctm (sp. nov. Imbricata, Phyllacrocephala) : puberulum ; caule gracili panicu- 

 lato ; foliis oppositis petiolatis hastato-sagittatis integris subtus crebre punctatis ; pedunculis solitariis ternisve 

 terminalibus monocephalis ; involucro cylindraceo 30-40-floro; squamis 20- 30 coriaceis vix striatis albi- 

 dis appressis appendice deltoidea foliacea squarrosis ; acheniis glabris angulis acutissimis hispidulis. — Cali- 

 fornia, No. 294 ; and Sonora Alta, Mexico, No. 252, Coulter. Between Mexico and Mazatlan, Gregg. 

 — Stems herbaceous, apparently erect, the base unknown. Leaves about an inch long, lanceolate-trian- 

 gular, either sagittate or hastate, the lobes two or three lines long, rather obtuse. Heads five or six lines 

 long ; the involucral scales imbricated in four or five series, all but the innermost abruptly foliaceous- 

 appendiculate. Flowers probably rose-color. 



