Y. 



PLANT^ WRIGHTIAN^. 



115 



to D. chrysantliemoides No. 432 of Coiilter's Mexican collection, Gregg's No. 540, 

 from Saltillo, and a plant of Galeotti's collection, without a numher, which, havin 

 coarser segments to the leaves, more dilated at their apex, are prohahly D. puhcs^ 

 cens, Lagasca^ DC. 



cr 



ramis 



359. Hymenatherum (Aciphyll^a) acerosum : fruticulosum, glahrum ; 

 ad apicem usque foliosis capitulo solitario subsessili terminatis ; foliis oppositis (raro 

 alteniis) et in axillis fasciculatis acerosis integerrimis ; involucro cylindraceo ; pap- 



po e paleis 18-20 



angustis 



in aristas setasve scahras inaequales 3 - 5-partitis. 



Dysodial (Aciphylleea) acerosa, BC.l Prodr. 5. p. 641. AciphyllEea acerosa, Grai/, 



Fl. Fendl. p. 91, adnot. Calcareous hills of the San Felipe: also on the Rio 



Grande, Texas ; July - Sept. — Two or three species of Hymenatherum now known 



to me having as many as eighteen or twenty palese to the pappus, and one having 



some of the palcce cleft into from three to five setae or setose teeth, I cannot avoid 



referring the present plant to this genus, with which it accords in hahit much het- 



ter than with Dysodia. A revision of the genus, as I should now receive it, is ap- 

 pended.* 



octophyllo (squamis obovato-oblongls valde carinatis) bracteis 6-8 lineari-subulatis integerrimis cincto ; 

 ligulls obovatis (aurantiacis ?) exsertis ; pappi setis in phalanges 8- 10 alternas dimldlo brevlorcs basi tan- 



tum paleaceo-concretis. 



R 



Gen, 4* 



198. B. tagctiflora, 



• 



HYMENATHERUM, Cass. 



Capltulum multlflorum heterogamum ; ligulis foemineis, Involucrum turbinatum vel campanulatum, e 

 squamis 10- 15 fere ad apicem cupulato-concretis gamophyllum, basi bracteatum seu ebracteatum* Ke- 

 ceptaculum planum, nudum vel subalveolatum. Styli rami fl. discicono brevissimo obtuso capitellati. 

 Achenia gracilia, striata, nunc subangulata. Pappus e paleis 10-20 nunc omnibus nunc alternis trifidis 

 (raro 5^fidis), lobis setiformibus ina^qualibus vel lateralibus dentiformibus. Herbse humiles vel sufTru- 

 ticuli; ramis monocephalis ; folils angustis involucrisque grosse glandulosis ; floribus flavis siccate nunc 



viridescentibus. 



^ 



% 2), Aclphyllaia § 



^ 



§ 



Hymenatherum & Aciphyltea, Gray, Pl. Fendl. p. 68, 91, adnot. 



1. AciPHYLL.i^A. Pappus e paleis 18-20 (conformlbus vel alternis minoribus) profunde trifidis, lobis 

 setiformibus, lateralibus sceplus 2-3-fidIs. Achenia teretja multistriata. — Fruticulus ericoldcus gla- 

 ber ; foliis acerosis integerrimis plerlsque oppositis ; capitulis ramulos foliosos terminantibus sessilibus. 



1. H. ACEEosTJM : vide supra. Dysodia ? (Aciphyllcea) acerosa, DC. Prodr. 5. p. 641. 



2. DvsoDioPsis. Pappus 10-paIeaceus ; paleis conformibus rigidis, aut submuticis aut tnanstatis. 

 Achenia 4 - 5-angulata. — Herba^ perennes .? glabrEB, Dysodla? facie ; foliis superioribus vel omnibus 

 alternis linearlbus Integcrrimis seu lacinlatis haud pinnatlpartitis ; capitulis pedunculatis pl. m. bracteatis. 



2. H. TAGETOiDES, Gray, Pl. Fendl. I. c. Vide p. 116. 



Wrigh 



Vide p. 116. 



§ 



l. Hymenatherum vcrum. Pappus 10 - 20-paIeaceus ; paleis 1 - 3-arIstatis vel alternis muticis. 

 Achenla subteretia. — Herbfc annua3 seu perenncs, nunc suffruticuli, humiles, glabra^ vel pubescentes ; 

 foliis pinnatlpartitis inferioribus tantum oppositis, lobis filiformibus subulatisve mtegernmis ; capitulis 

 pedunculatis basi haud vel parce bracteatls. 



Species annucB ; foUis muticis haud rigidis ; pedunculis breviuscuUs IracteoUs suMatis insfructis. 

 4. H. BCEBEKOiDES (sp. nov.) : glabrum, diffusum; foliis pinnati- (7-) partitis, lobis filiformi-Iineanbus 

 breviusculis ; pedunculis subcorymbosis breviusculis multibracteatis ; involucro hem.sphaBnco ebracteato , 



