ROBINSON. — SYNOPSIS OF THE GENUS NOCCA. 469 



equal length without glandular tip, not rubescent: leaves elliptical-ob- 

 tusish or very shortly acuminate, grayish-pubescent beneath, somewhat 

 scabrous upon both surfaces, shortly but manifestly petiolate, the upper 

 leaves much reduced, oblanceolate, acuminate, remotely denticulate, 

 much shorter than the rather elongated interuodes; secondary nerves 

 2 or 3, originating some distance above the base : bracts linear, acute, 

 exceeding the flowers. — Lagascea Moginniana, DC. Prodr. v. 92 (1836) 

 as to pi. of Haenke not of Mocifio. — Mexico without locality, Huenke, 

 in herb. De Candolle. For an excellent sketch of this plant and informa- 

 tion concerning it I am indebted to the kindness of Mr. Robert Buser. 



b. Indumentum unknown : leaves ovate, acute, green upon both surfaces, finely 

 serrulate with approximate purple-glandular teeth (about 10 to the centimeter). 



4. N. MogiNNiANA, O. Kuntze, 1. c. (1891), as Noccaea Mociniana. 

 Lagascea Mocinniana, DC. Prodr. v. 92 (183G) as to pi. of Mocino. — 

 Mexico without locality, Mocino. 



c. Indumentum of the stem widely spreading, composite, consisting of a dense 



short gray subglandular puberulence and a long white horizontally spreading 

 villosity : leaves ovate, serrate, the margins neither purple nor glandular ; 

 both surfaces grayish-pubescent. 



5. N. Pringlei. Stems slightly lignescent, 1 to 2 m. high, brown, in 

 dried state striate, covered with a fine spreading gray puberulence and 

 long spreading white villosity : leaves ovate, somewhat rigid, 5.5 to 

 6.5 cm. long, 3 to 4 cm. broad, serrate with about 2 teeth to the centimeter, 

 3-nerved from much above the base and pinnately veined, gray-tomen- 

 tose upon both surfaces, especially so beneath, obtuse or acutish at the 

 apex, rounded at the base ; petiole 3 to 4 mm. long : branches of the 

 inflorescence rigid, divergent, with long internodes and spatulate bracts ; 

 glomerules rather loose, not many-flowered: involucres 1-flowered, cylin- 

 drical, upwardly canescent-villous, 1 cm. long, cleft nearly to the middle 

 into 5 erect very unequal teeth : corolla 1.2 cm. long, purple, covered 

 on the outside with a fine gray tomentum ; the tube very short, slender; 

 the throat cylindrical, 4 to 5 mm. in length ; teeth 5, ovate, scarcely 

 acute : mature achene not seen. — Collected by C. G. Pringle on lime- 

 stone ledges above Iguala, Guerrero, Mexico, 10 October, 1900, no. 

 8400. Type in herb. Gray. 



d. Indumentum of the stem fine, appressed : leaves elliptic-ovate, finely or more 



coarsely serrate, but not noticeably purple-glandular on the margin. 



1. Leaves green, lucid, and scabrous-pubescent upon both surfaces. , 



6. N. RiGiDA, Cav. Ic. iii. 12, t. 224 (1795) ; Sweet, Brit. Fl. Card, 

 ser. 2, t. 26. Noccaea rubra, Cass. 1. c. 104 (1822). Lagascea rubra, 

 HBK. 1. c. 24, t. 311 (1820). — Mexico, Cordillera of Guihilaque, 



