v. PLANTS WRIGHTIANa;. 89 



261. T. Wrightii, Gray, PL Fendl. p. 65. Low or wet places, near Austin 

 and San Marcos, Texas ; July. — There is a third species in Gregg's last Mexican 

 collection.* 



262. Mach.5:ranthera (Dieteria) canescens, var. glabra : foliis lanceolatis 

 viridibus cauleque scabridis fere glabris ; ramulis puberulis ; capitulis laxe corym- 

 bosis ; involucri campanulato-turbinati squamis plui'iserialibus apicibus viridibus 

 parvis vix squarrosis. — Sand-bars of the Rio Grande below El Paso, and at Pre- 

 sidio de San Elisario, New Mexico ; Sept. — This is better marked in its charac- 

 ters than some of the species described by Nuttall and adopted in the Flora of 

 North America ; but I am confident that Dieteria canescens, pulverulenta, incana, 

 divaricata, viscosa, and sessiliflora, Nutt., Torr. Sf Gray, Fl. 2. p. 100, are all forms 

 of one widely spread and very polymorphous species, which varies according to sit- 

 uation, &c. D. asteroides, Torr. in Emory, Rep. p. 142 (which has lanceolate 

 leaves), accords with one of Wright's specimens, except that the involucral scales 

 are looser and with rather longer tips. 



* Trichocoronis Greggii (sp. nov.) : pusilla ; caule procumbente vel fluitante ; foliis oblongis integer- 

 rimis subamplexicaulibus ; pedunculo solitario monocephalo ; tiibo corolloe fauce campanulata asquilongo ; 

 involucri squamis linearibus ; pappo plurisquamellato-subcoroniformi et 2 - 3-aristeIlato. — Between Mex- 

 ico and Mazatlan, Gregg. — Leaves thickish, 2-3 lines long. Peduncle simple, one or two inches long. 

 Head twice as large as that of T. Wrightii ; the involucre, &c. similar. 



Stevia trichopoda, PI. Fendl. p. 64, is the same as S. podocephala, DC. The pappus of some of the 

 exterior flowers is occasionally awnless. 



The genus Carphochcete is confirmed by two additional species. The character must be somewhat ex- 

 tended as to the pappus : — 



CARPHOCHiETE, Gray, PL Fendl. p. 65. 



Capitulum 4-6-florum, homogamum. Involucrum cylindricum ; squamis lanceolatis substriatis imbri- 

 catis, exterioribus brevioribus. Receptaculum nuduin. Corollce tubulosce, hypocraterimorphffi, involucrum 

 superantes, lobis lanceolatis glabris. Styli rami filiformes. Achenia gracilia 10-striata, costis alternis for- 

 tioribus subpentagona. Pappus paleaceus ; paleis 5-14 elongatis lineari-lanceolatis denticulatis uniner- 

 viis, nervo crasso in aristam barbellato-scabram corolla subEequilongam sensim exserente, atque paucis 

 (1-5) parvis exterioribus muticis. — Herbae basi suffruticosa, vel suffrutices, Mexicanaa ; foliis oppositis 

 sessilibus angustiis uninerviis punctatis integerrimis ; capitulis terminalibus seepius laxe corymbosis ; flori- 

 bus roseis vel albidis circiter unciam longis. 



1. C. WisLizENi {Gray, PI. Fejidl. I. c.) : glaberrima ; caulibus spithamsis ; foliis anguste linearibus 

 elongatis ; squamis involucri vix ciliatis impunctatis subulato-acuminatis ; pappo e paleis 5 aristatis et 5 ex- 

 terioribus parvis ovalibus cuneatisve enerviis. — Mountains near Cosiquiriachi, Northern Mexico, Wisli- 

 zcnus. — Leaves two inches or more in length, scarcely a line wide. 



2. C. Grahami (sp. nov.) : caulibus gracilibus pedalibus et ultra puberulis ; foliis linearibus seu lineari- 

 oblongis obtusissimis, superioribus parvis dissitis ; squamis involucri arachnoides-ciliatis mucronatis impunc- 

 tatis ; pappo paleis 7-9 aristatis cum 1-3 exterioribus parvis oblongis enerviis. — Mexico, Graham (in 

 herb. Benth.), Seemanii. — Cauline leaves an inch or an inch and a half long, two or three lines wide, the 

 uppermost much smaller, conspicuously dotted. Heads corymbose. Branches of the style very long. 



3. C. BiGELOVii (sp. nov.) : puberula, fruticosa ; foliis oblongis confertis ; squamis involucri subacu- 

 minatis resinoso-punctatis ; paleis pappi 12 - 14 aristatis cum 1-3 parvis lanceolatis muticis uninerviis. — 

 On the boundary between Mexico and New Mexico, Dr. I. H. Bigelow. Communicated in a letter to 

 Dr. Torrey. — The leaves barely half an inch long. Heads larger than in the two preceding. Achenia 

 half an inch long. Corolla two thirds of an inch long. 



