40 PROCEEDINGS OF THE AMERICAN ACADEMY 



dice obtusa auctas. Styli rami fl. herm. appendice sublineari obtusa 

 hirtello-pubera superati. Achenia oblongo-linearia, tetragona, fere 

 glabra, angulis prominulis. Pappus duplex, e paleis 4 brevibus latis 

 truncatis enerviis apice erosis, cum aristis totidem alternantibus setifor- 

 mibus sursum clavellatis barbellulatis corollam disci subaequantibus. — 

 Fruticulus ; capitulis parvulis brevi-pedunculatis ; floribus albo-roseis; 

 foliis parvis subalternis cinereo-pubescentibus deltoideo-ovatis dentatis 

 petiolatis. 



Eutetras Palmeri. — Same station as the preceding, collected 

 by Dr. Palmer, very sparingly. No. 520J-. The genus to be placed 

 near Laphamia and Perityle, of which it has the habit ; but with 

 very different achenia and pappus, in these respects more like Baeria, 

 section Dichceta. 



Bahia anthemoides. Achyropappus anthemoides, IIBK., Nov. 

 Gen. & Spec. iv. 257, t. 390, in which (as DeCandolle states) the 

 "radio albo" is probably a mistake, and the pentaphyllous involucre 

 probably a minimum number. In our plant the involucre is 10-phyl- 

 lous ; the paleae of the pappus dilated-obovate and nerveless with 

 a narrowed thickened base. The distinctions between Bahia and 

 Schkuhria have to be determined anew, and Achyropappus must fall 

 into the former. No. 494. 



Tagetes Parryi. Elata, ramosissima ; ramis gracilibus foliosis 

 capitulo solitario longiuscule pedunculato terminatis cum foliis pin- 

 natis tomentoso-puberulis ; foliolis paucijugis subsessilibus ovalibus 

 oblongisve (circiter semipollicem longis) obtusissimis argute dentatis 

 (dentibus acuminatis), additis paucis cauli proximis depauperatis pi. 

 m. setiferis ; pedunculo sub capitulo clavato fistuloso ; involucro cam- 

 panulato 8-dentato (semipollicari) ; ligulis 8 obovatis magnis (lin. 8-9 

 longis) ; pappo e paleis 1-2 subulatis aristiformibus 4-3 brevibus ob- 

 longis truncatis. — * Abundant in hilly districts southeast of San Luis 

 Potosi, forming dense bunches. A showy species. No. 504. 



Perezia Parryi. P. nance proxima, multicaulis ; caulibus 

 ramisve subsimplicibus spithamasis usque ad apicem monocephalum 

 foliosis ; foliis parvulis (lin. 6-9 longis) obovatis oblongisve basi an- 

 gusta sessilibus margine spinuloso-dentatis, summis capitulum involu- 

 crantibus ; involucro 15-floro, bracteis cuspidato-acuminatis, extimis 

 ovatis ; acheniis (etiam ovariis) glaberrimis. — Gravelly hills near 

 San Luis, also at Saltillo, in clumps. No. 545. 



Perezia Coulteri. Herbacea, fere glabra; caule (ramo?) 

 gracili simplici (2-3 ?-pedali) apice in cymam nudam laxe polycephalam 

 deliquescente ; foliis tenuiter papyraceis angusto-oblongis utrinque ob- 



