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 api 
1-2(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 attenuatis ; 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 unifloris; floribus penta- 
meris ; calycis lobis linearibus attenuatis 6 mm. longis margine 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, Chihuahua, 2 June, 1891, C. V. Hartman, no. 717 (type, in 
Gray Herb.). This plant of somewhat striking tufted habit was dis- 
tributed as Erythraea calycosa, 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. Zrythraea nudicaulis 
Engelm. Proc. Am. Acad. xvii. 222 (1882). 
Centaurium pauciflorum (Mart. & Gal.), n. comb. Lrythraea 
paucijlora Mart. & Gal. Bull. Acad. Brux. xi. 873 (1844). 
Centaurium Pringleanum (Wittr.), n. comb. Hrythraea Pring- 
leana Wittr. Bot. Gaz. xvi. 85 (1891). ie 
Centaurium quitense (HBK.), n. comb. rythraca quitensis 
HBK. Nov. Gen. et Spee. iii. 178 (1818). Cicendia quitensis Griseb. 
Linnaea, xxii. 33 (1849). Erythraea divaricata Schaffner ex Schlecht. 
Bot. Zeit. xiii. 920 (1855). Hrythraea chilensis Benth. Pl. Hartw. 89 
(1842), non Pers. Céentaurium divaricatum Millsp. & Greenm., Field 
Columb. Mus. Bot. Ser. ii. 309 (1909). 
Centaurium retusum (Rob. & Greenm.), n. comb. Hrythraea retusa 
Rob. & Greenm. Proc. Am. Acad. xxxii. 38 (1896). 
eins setaceum (Benth.), n. comb. Lrythraea setacea 
nth. Bot. Sulph. 128 (1845). 
Beiarice Ped oie? (Mart. & Gal.), n. comb. Erythraea 
macrantha B major Hook. & Arn. Bot. Beech. 438 (1841). E. tenuif olia 
ake & Gal. Bull. Acad. Brax. xi, 372 (1844). Gyrandra speciosa 
th. Bot. Sulph. 127, t. 45 (1845). ; 
ee tad Gomes), n. comb. Hrythraea tri- 
Erythraea chironivides 
pS 
