500 PROCEEDINGS OF THE AMERICAN ACADEMY. 



to 20 mm. long, the scarcely ampliate tube twice exceeding the calyx ; 

 the pilose lips subequal : style densely bearded. — Morelos, mountains 

 above Cuernavaca, alt. 2,460 to 2,620 in., Oct. 13, 1900 (C. G. Pringle, 

 no. 8403), Sept. 1, 1900 ( C. G. Pringle, no. 9204). Closely related to 

 S. prunclloides, II BK. (no. 40 of the writer's synopsis), but differing 

 from that and the other members of the group in its tall erect stem. 



S. (Vulgares) igualensis. Tall (1 m. or more high), the strongly 

 grooved quadrangular stem canescent with close pubescence : leaves 

 broad-ovate, the lower suborbicular, short-acuminate, rounded at base, 

 5 to 7 cm. long, 4 to 5.5 cm. broad, coarsely crenate-serate, minutely 

 pubemlent or glabrate on both faces, pale beneath, on slender canescent 

 petioles 1 cm. or less in length : racemes long and slender, becoming 1.5 

 to 2 dm. long ; verticels 10-20-flowered, mostly approximate, the lower 

 1.5 cm. apart; bracts lanceolate, caducous; pedicels becoming 2 mm. 

 long: calyx in anthesis about 3 mm. long, short-pilose-hispid on the 

 nerves, with short deltoid teeth; corolla blue, pilose, 1 cm. long; the 

 slightly ventricose tube twice exceeding the calyx ; galea and lip sub- 

 equal : style bearded. — Guerrero, limestone mountains above Iguala, 

 alt. 1,230 m., Sept. 26, 1900 (C. G. Pringle, no. 8418). Related to 

 S. brachyodonta, Briq. (no. 59 of the writer's Synopsis) and & Ghies- 

 breghtii, Fernald (no. 60). From the former distinguished by its coarser 

 habit, cinereous stem, short petioles and appressed teeth of the leaves, 

 and shorter pedicels ; from the latter by its coarser habit, and broader 

 glabrate leaves without the characteristic lauate pubescence of S. 

 Ghiesbreghtii. 



S. (Scorodoniae) Dugesii. Shrub, the branches canescent with 

 closely matted simple hairs: leaves oblong or oblong-ovate, 2 to 4 cm. 

 long, rounded at base, acute or bluutish at tip, strongly rugose, green 

 above, canescent beneath with close simple hairs ; petioles slender, 1.5 cm. 

 or less long: racemes becoming 1 dm. or so long, simple; verticels 

 8-12-llowered, the lowest 1 to 1.5 cm. apart; pedicels at most 1 nun. 

 long: calyx cuneate-campanulate, canescent with short mostly simple 

 appressed liairs, in anthesis 7 mm. long, with short flaring blunt or 

 merely short-subulate lobes: corolla 1.5 cm. long, pubescent with short 

 gland-tipped hairs. — Guanajuato, Aug., Sept., 1900 {A. Duges). 

 This plant, known as "<1n<t cimarona" is nearest related to S. Icuiantha, 

 Henth. (no. 1<)1 of the writer's Synopsis), but is distinguished by its 

 narrow leaves, shorter pubescence throughout, larger calyx, and by the 

 pubescence of the corolla, which in X lasiantha is pilose and essentially 

 glandless. 



