ROBINSON. — SPERMATOPHYTES, NEW OR RECLASSIFIED. 397 



caespitosum 5-10 cm. altum basi densissime foliatum ; radice simplice 

 2-6 cm. longa ; caulibus 4-22 subsimplicibus 4-angulatis gracilibus apice 

 l-2(rarius 3)-floris, ramis 1-2 erectis ; foliis radicalibus rosulatis obo- 

 vato-spatulatis 1-2 cm. longis 4-8 mm. latis apice rotundatis basi in 

 petiolum attenuates ; foliis caulinis 3-4-jugis lineari-oblongis vel 

 linearibus 8-10 mm. longis 1-2.7 mm. latis 1-nerviis crassiusculis ; 

 pedunculis 1.5-4 cm. longis erectis nudis unifioris ; floribus penta- 

 meris ; calycis lobis linearibus attenuatis 6 mm. longis margin e scari- 

 osis quam tubus corollae paulo brevioribus ; corolla 1.5 cm. longa 

 tubo constricto flavido, limbi lobis ellipticis 6 mm. longis 2 mm. latis 

 apice rotundatis ; filamentis antheras subaequantibus gracilibus ; stig- 

 mate capitato-subbilobo. — Mexico : most meadow, Hacienda of St. 

 Diego, Chihuabua, 2 June, 1891, G. V. Hartman, no. 717 (type, in 

 Gray Herb.). This plant of somewhat striking tufted habit was dis- 

 tributed as Erythraea cahjcosa, but differs from that species rather 

 markedly in its lower stature, much smaller flowers, and clustered 

 chiefly 1 -flowered stems. 



Centaurium nudicaule (Engelm.), n. comb. Erythraea nudicaulis 

 Engelm. Proc. Am. Acad. xvii. 222 (1882). 



Centaurium pauciflorum (Mart. & Gal.), n. comb. Erythraea 

 paucijlora Mart. & Gal. Bull. Acad. Brux. xi. 373 (1844). 



Centaurium Pringleanum (Wittr.), n. comb. Erythraea Pring- 

 leana Wittr. Bot. Gaz. xvi. 85 (1891). 



Centaurium quitense (IIBK.), n. comb. Erythraea quitensis 

 HBK. Nov. Gen. et Spec. iii. 178 (1818). Cicsndia quitensis Griseb. 

 Linnaea, xxii. 33 (1849). Erythraea divaricata Schaffner ex Schlecht. 

 Bot. Zeit. xiii. 920 (1855). Erythraea chilensis Benth. PL Hartw. 89 

 (1842), non Pers. Centaurium divaricatum Millsp. & Greenm., Field 

 Columb. Mus. Bot. Ser. ii. 309 (1909). 



Centaurium retusum (R,ob. & Greenm.), n. comb. Erythraea retusa 

 Rob. & Greenm. Proc. Am. Acad, xxxii. 38 (1896). 



Centaurium setaceum (Benth.), n. comb. Erythraea setacea 

 Benth. Bot. Sulph. 128 (1845). 



Centaurium tenuifolium (Mart. & Gal.), n. comb. Erythraea 

 macrantha ft major Hook. & Arn. Bot. Beech. 438 (1841). E. tenuifolia 

 Mart. & Gal. Bull. Acad. Brux. xi. 372 (1844). Gyrandra speciosa 

 Benth. Bot. Sulph. 127, t. 45 (1845). 



Centaurium trichanthum (Griseb.), n. comb. Erythraea tri- 

 cqntka Griseb. Gen. et Spec. Gent. 146 (1839). 



Centaurium venustum (Gray), n. comb. Erythraea chironioides 

 Torr. Bot. Mex. Bound. 156, t. 42 (1859), not Gyrandra chironioides 

 Griseb. Erythraea venusta Gray, Bot. Calif, i. 479 (1876). 



