^' PLANTS WRIGHTIAN^. 83 



the ray and disk. Such species as P. elongata have the pappus as truly biserial as 

 any Lorentea.* 



245. P. (EuPECTis) PROSTRATA, Cav. Ic. i.p. 12. t. 324; DC. Prodr. 5. j). 100. 

 Mountain valleys towards the Rio Grande ; and at Presidio de San Elisario, New 

 Mexico ; Aug. - Sept. — The specimens belong to a depauperate state of the species, 

 being only from one to three inches high. The involucral scales are not condupli- 

 cate, each embracing a flower, as in the foregoing and many other species. The 

 palea; of the pappus are broader than in the figure of Cavanilles. 



246. LiATRis PUNCTATA, HooL Fl. Bor.-Am. 1. p. 306. t. 55 ; Torr. 8r Gray, 

 Fl. 2. 2^- 69. Pass of the Limpia ; Aug. — This is one of the slender, narrow- 

 leaved forms, with the scales of the involucre very obtuse and abruptly mucronate. 

 L. mucronata, DC. (founded on Berlandier's No. 1926) is a similar but more depau- 

 perate state of this same species: while L. resinosa, DC, was described from a cul- 

 tivated specimen of the variety (var. /3. Torr. Sf Gray, I c.) with lanceolate-pointed 

 scales. f 



t L. AciDOTA, Engelm. 8r Gray, PI. Litidh. p. 10. L. mucronata, Torr. ^ Gray, 

 Fl 2. p. 70. Western Texas. — L. mucronata, Engelm. 8f Gray, PL Lindh. I. c, is 

 only a variety of this, with more abruptly mucronate-pointed involucral scales. 



247. KuHNiA EUPATORioiDES, Linti. ; Torr. ^ Gray, Fl. 2. p. 78 : between var. 

 y. gracilis and a. gracillima. Gray, PI. Lindh. 2. p. 218 (K. leptophylla, Scheele). 

 On the Las Moras and Zacate Creeks, Texas. Also on the Rio Grande. Some of 

 the lower leaves are large and lanceolate ; those of the branches very narrow and 

 slender. 



248. K. EUPATORIOIDES, var. ; nearly the same as the last, but depauperate; 

 from six to eight inches high. Mountain valleys between the Limpia and the Rio 

 Grande, New Mexico ; Aug. 



248% Brickellia Riddellii. Clavigera dentata, DC ! Prodr. 5. p. 128. C. 

 Riddellii, Torr. 8r Gray, Fl. 2. p. 77; Gray, PI. Lindh. 2. 2^- 218. On the Rio 

 Grande, Texas. I find from De Candolle's herbarium that this is indeed his Clavi- 

 gera dentata ; but the leaves are so little toothed, and often entire, that I have pre- 

 ferred a later specific name while referring the plant to another genus. The pap- 

 pus afi'ords no available distinction between Brickellia and Clavigera, and the latter 



* The species have to be arranged under a considerable number of sections, somewhat as follows: — 

 Pappus coroniformis, vel in disco vel in radio, et sfepius 1 - 4-aristatis : 



Aristis sursum scabris v. nullis. (P. angustifolia, filipes, uniaristata, et sp. nov. Am. Merid.) Pectidopsis. 



Aristis cornels retrorsum hispidis. (P. Coulteri, multiseta.) Heteropectis. 



Pappus uniformis, ex aristis paucis cornels Iffivissimis. Pectidium. 



Pappus uniserlalis, e paleis vel aristis basi paleaceo-dilatatis paucis. Eupectis. 



Pappus biserialis paleaceus, in radio nunc diraidiato-ariculseformis, nunc nullus. Lorentea. 



Pappus setosus, 1 - 2-serialis, setis capillaribus basi vix aut ne vix dilatatis, in radio nunc 



dimidiato-auriculseformis. Pectothrix. 



t Liatris radians, Berloloni, Misc. Bot. 5. p. 9. t. 1, is L. elegans. L. lanceolata, Berloloni, I. c. p. 

 11. t. 3, is L. gracilis, Pursh. L. sessiliflora, Berloloni, I. c. p. 10. t. 2, is L. spicata. L. umbellata 

 Berloloni, I. c. t. 4./. 1, is Vernonia angustifolia, as already stated ; and the same author's Eupatorium 

 glastifolium (I. 4./. 2) is Liatris odoratissima ! 



