516 PROCEEDINGS OF THE AMERICAN ACADEMY. 
© O Lower faces of leaves and nerves of calyces pubescent. 
+ Verticels crowded into a dense spiciform raceme 5 to 6 cm. long: stem shrubby. 
77. S. preroura, Brig. 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 
em. 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. flexuosa, 
Seem. |. c. not Presl; Hemsl. 1. c. 556, in part, with doubt. — North- 
western Mexico, in the Sierra Madre (Seemann). 
xX 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 
em. 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 (@. G. 
Pringle, no. 6850), Sept. 29, 1898 (EZ. W. D. Holway, no. 3028). 
e. Calyx in anthesis 7 to 9 mm. long. 
1. Stem and leaves glabrous : the latter 1 to 1.3 dm. long, serrate. 
80. S. atvasaca, Oerst. Vidensk. Meddel. 1853, 38; Hemsl. Lc. 
552. — Described from Costa Rica. No specimen seen. 
