74 NORTH AMERICAN FLORA 
shorter than the leaves; West Indian plants. 
Corolla glabrous; leaf-blades manifestly toothed. 
Corolla pubescent; leaf-blades obscurely toothed. 
Corolla much exceeding the calyx; panicles several-many-flowered, 
mostly longer than the leaves; continental plants. 
Leaf-blades narrow, of a narrowly lanceolate or linear-elliptic 
type. 
Leaf-blades broader, of an oblong, ovate, oval, suborbicular: or 
somewhat reniform type. 
Calyx less than one half as long as the corolla, the lobes mostly 
wider than long. 
Calyx one half as long as the corolla or more, the lobes deltoid 
or longer than wide. 
Panicle-branches twice as long as the corollas or more. 
Panicle-branches about as long as the corollas or slightly 
longer. 
Corolla glabrous. 
Filaments pubescent; leaf-blades rounded or sub- 
cordate at the base. 
Panicle-rachis and branches pubescent. 
Panicle-rachis and branches glabrous. 
Leaf-blades of an ovate type, glaucous; 
panicles short, few-flowered. 
Leaf-blades of an oblong type, green; panicles 
elongate, many-flowered. 
oe glabrous; leaf-blades acuminate at both 
ends. 
Corolla pubescent, with short stiff hairs, or hirsute or 
glandular-hirsute. 
Corolla relatively small, less than 8 mm. long; 
plants of Mexico and Central America. 
Filaments longer than the anthers. 
Corolla pubescent with mostly short stiff or 
crisped glandless hairs. 
Twigs or branchlets strigose, hirsute or 
hirsutulous, the hairs glandless. 
Twigs strigose; calyx-lobes lanceolate 
to triangular-lanceolate. 
Twigs hirsute or hirsutulous; calyx- 
lobes deltoid to ovate-deltoid. 
Twigs shaggy-hirsute; bracts con- 
spicuous; stamens less than 4 mm. 
long, the filaments sparingly 
short-hairy. 
Twigs hirsutulous; bracts incon- 
spicuous; stamens over 4 mm. 
long, the filaments copiously 
long-hairy. 
Twigs or branchlets glandular-pubescent. 
Corolla pubescent with stiff, often long, 
gland-tipped hairs. 
Calyx pubescent with short, fine, mostly 
glandless hairs. 
Calyx pubescent with coarse, long, mostly 
gland-tipped hairs. 
Leaf-blades deltoid-ovate or cordate- 
ovate. 
Leaf-blades ovate to oblong, or indi- 
vidually oval or suborbicular or 
rarely broader. 
Leaf-blades cordate at the base. 
Leaf-blades abruptly narrowed, 
rounded, or truncate at the 
base. 
Calyx-lobes lanceolate, triangu- 
lar-lanceolate or ovate-lance- 
olate. 
Calyx over 9 mm. wide in 
anthesis; leaf-blades mani- 
festly serrulate; anther-awns 
less than one half as long as 
the sacs. 
Calyx less than 9 mm. wide in 
anthesis; leaf-blades ob- 
scurely serrulate; anther- 
awns over one half as long 
as the sacs. 
Calyx-lobes deltoid. 
Filaments as long as the anthers or shorter. 
13. 
14, 
15. 
16. 
17. 
18. 
19, 
20. 
[VoLuME 29 
. Sphagnicola, 
. domingensis, 
ag 
G. angustifolia. 
. G. acuminata. 
G, longipes. 
G, nitida, 
. G. glaucifolia. 
11. 
12. 
G. Nelsonii. 
G. setosa, 
G. gracilis. 
G. barbaia. 
G. parvifolia. 
G. glandulifera. 
G. lancifolia. 
G. hirtifiora. 
G. odorata. 
G. costaricensis. 
. G. Rosei. 
. G. hidalgensis. 
23. 
G. trichocalycina, 
