516 PROCEEDINGS OF THE AMERICAN ACADEMY. 



O O Lower faces of leaves and nerves of calyces pubescent. 

 + Verticels crowded into a dense spiciform raceme 5 to 6 cm. long: stem shrubb5\ 



77. S. PTEROURA, Briq. Ann. Conserv. Jard. Bot. Geneve, ii. 139. 

 Described from Costa Rica. 



+ + Verticels becoming remote. 

 X Branches slender, glabrate : calyx tubular-campanulate, not enlarged above. 



78. S. Seemannii. Frutescent (?) : branches minutely pilose or gla- 

 brate, purplish ; leaves elliptic-ovate, acuminate at the tip and at base to 

 a slender petiole 1.5 to 3.5 cm. long, sharply serrate, above sparsely 

 appressed-setulose, beneath minutely so on the nerves or glabrate, 4 to 7 

 cm. long, 2 to 4 cm. wide : raceme 1 dm. or less in length ; verticels 

 about 6-flowered, all a little remote, the lowest 1 cm. apart : bracts 

 purple, lance-attenuate, persistent, slightly exceeding the setulose pedi- 

 cels, 2 to 4mm. long: calyx purple-tinged ; the tube barely twice exceed- 

 ing the lips ; the upper lip broad-ovate, acuminate-subulate, the lower with 

 lance-ovate acuminate lobes : corolla 1 cm. or so long, the tube a little 

 exserted ; galea pilose, equalling the lip: style bearded. — S. Jlexuosa, 

 Seem. I. c. not Presl; Hemsl. 1. c. 556, in part, with doubt. — North- 

 western Mexico, in the Sierra Madre (Seemann). 



X X Stems herbaceous, stout, densely puberulent in decussating bands : calyx 



slightly flaring above. 



79. S. fluviatilis. Stems 1.5 m. or less high, very quadrangular : 

 leaves rhombic-ovate, short-acuminate at tip, cuneate at base, crenate- 

 serrate, the upper 5 to 9 cm. long, the lowermost broader, subtruncate at 

 base, 1.5 dm. long, nearly as broad, puberulent above, especially on the 

 nerves, cinereous beneath ; petioles cinereous-puberulent, the lowest 5 

 cm. long, the others shorter : racemes slender, flexuous, the terminal 

 becoming 2 dm. long ; verticels 10-20-flowered, the lower remote, the 

 lowest 1 cm. apart: bracts ovate, acuminate : pedicels filiform, becoming 

 2 to 3 mm. long : calyx green, strongly bilabiate, the tube twice exceed- 

 ing the lips ; the upper lip ovate, acuminate, entire, the lower with 

 narrower attenuate lobes : corolla deep blue, pilose, 1 cm. long ; the tube 

 slightly exserted ; galea about equalling the lip : style bearded. — Mo- 

 RELOS, by streams near Cuernavaca, alt. 1,540 m., May 16, 1898 (0. G. 

 Pringle, no. 6850), Sept. 29, 1898 {E. W. D. Holway, no. 3028). 



c. Calyx in anthesis 7 to 9 mm. long. 

 1. Stem and leaves glabrous : the latter 1 to 1.3 dm. long, serrate. 



80. S. alvajaca, Oerst. Vidensk. Meddel. 1853, 38 ; Hemsl. I. c. 

 552. — Described from Costa Rica. No specimen seen. 



