V. PLANTuE ■WRIGHTIAN^. 105 



feet high, much branched and leafy ; the filiform leaves two inches long. The ster- 

 ile and fertile capitula are intermixed in the ample panicles, which are loaded with 

 the silvery-scarious fruit. 



t Halea Texana, Gray, PL Fendl. p. 83, ^ PI Lindli. 2. p. 227. Rocky 

 prairies, Austin, Texas ; May. — The pappus is often obsolete. — H. Ludoviciana 

 was collected by Berlandier. 



t Heliopsis LiEvis, y. scABRA, Torr. &f Gray, Fl. 2. p. 303. Eastern Texas.* 



322. Zinnia (Diplothrix -f) grandiflora, Nutt. in Trans. Amer. Phil. Soc. (n. 

 ser.) T.p. 348; Torr. Sr Gray, Fl. 2. p. 298; Torr. in Emory, Rep. t. 4; Gray, PI. 

 Fendl. t. 81. Hills between the Pecos and the Limpia ; Aug. Also in the coll. of 

 1851. — Ray-achenia with a pappus of two teeth or short awns; those of the disk 

 with one, two, or sometimes three setiform awns, or some of them awnless. Rays 

 usually five. 



323. Z. (Diplothrix) pumila. Gray, PI. Fendl. p. 81, adnot. Hills near El 

 Paso; Oct. " Rays white. Stems 6-12 inches high," woody. Also from Buena 

 Vista, in the second collection of Gregg ; " flowers yellowish-white." — The woody, 

 depressed stems are a quarter of an inch in diameter at the base. Heads larger 



* Andrieuxia Mexicana, DC. (as is noted by Reuter in the Candollean herbarium) is described and 

 figured from a specimen of Heliopsis buphthalmoides, or canescens, the same as Galeotti's No. 2109, and 

 Linden's No. 345. Hooker's specimen of Andrieux's No. 303 is the same thing. 



t ZINNIA, Linn. 



§ 1. Zinnia, DC. Herbse annuse, foliis ovatis seu lanceolatis. Ligulaj plures. Achenia radii calva. 



Z. species omnes DC. Prodr. (Z. intermedia, Engelm. — Z. tenuiflora, Jacq.) 

 § 2. Diplothrix. Suffrutices multicaules ramosissimi, humiles vel depress! ; fohis anguste lanceolatis vel 



acerosis. Capitula parvula pluriflora. Ligute 4-5, ovales seu rotundatee. Achenia radii apice soepius 



bidentata seu biaristellata (rare tridentata, nempe dente ex angulo interne instructa) ; disci 1-2- (raro 



3-) aristata. — Diplothrix, DC. Prodr. 5. p. 611. 



* Herha diffusa, hasi lanlum sufruticosa, ligulis intense croceis. 



Z. LINEARIS, Benth. PI. Hartw. no. 117. p. 17. Mexico, Harlweg. 

 * « Suffrutices vel siiffruliculi, caulihus fasligialis confertisve foliosissimis ; foliis impresso-punctatis 



rigidis ; ligulis ratione capituli magnis jiavis max suiphureis vel ochroJeucis ; involucro sapius angus- 



io ; receptaculo parvo. 



Z. GRANDIFLORA (Nutt., Torr. ^ Gray, I. c.) : scabro-hispidula, spithama;a ; foliis linearibus trinerviis ; 

 ligulis maximis. — Vide supra. 



Z. PUMILA {Gray, PI. Fendl. I. c.) : puberula, mox glabrata ; foliis angustissime linearibus obtusis 

 uninerviis ; ligulis parvulis (2-4 lin. longis). — Vide supra. 



Z. JUNIPERIFOLIA : foliis glabellis subulato-acerosis acutis trinerviis nervo medio marginibusque crassi- 

 oribus ; pedunculis capitulo foliisque longioribus nunc subelongatis. — Diplothrix juniperifolia, DC./ I. c. 

 — San Luis Potosi, Berla7idier. (Very imperfect specimens.) Near Buena Vista, New Leon, Gregg 

 (No. 68). Heads twice the size of those of Z. pumila and Z. acerosa ; but the ligules in the specimens 

 smaller proportionally. They are " bright orange " in Gregg's specimen, but have not yet become charta- 

 ceous. Leaves rigid, six to twelve lines long. 



Z. ACEROSA : foliis glabellis filiformi-acerosis vel setaceis obscure uninerviis, supremis pcdunculo roquali- 

 bus. — Diplothrix acerosa, DC. ! I. c. Vide p. 106. 



1^ 3. Heterogyne. Herbfe suffrutescentes multicaules, foliis linearibus. Ligulas paucce, parvse, per- 

 sistentes, seu 2-3 vel omnes plane deficientes, atque acheniis apice biaristellatis stylo tantum superatis. 



Z. ANOMALA. Vide p. 106. 



