38 NORTH AMERICAN FLORA 
Free portion of the bracts suborbicular, emarginate, dentate 
nearly to the base. 
Free portion of the bracts rhombic-hastate, acute, 3-dentate. 
Branches fruticose; leaves short-petiolate or sessile. 
Bracts spongious, not compressed, united to the middle or higher. 
Bracts united nearly to the apex, dentate only at the apex, the 
teeth few, the sides slightly tuberculate or often smooth. 
Bracts united only to the middie, the margins green, deeply 
laciniate-dentate, the sides sharply muricate. 
; . XTX. HYMeNgeLYTRAE 
A single species. 
XX. LENTIFORMES 
Flowers monoecious; bracts entire. 
Flowers dioecious. 
Branches conspicuously angled, spinose; bracts obscurely denticulate, 
not appendaged. 
Bracts 3-4 mm. wide; upper leaves petiolate. 
Bracts 5-6 mm, wide; upper leaves sessile. 
Branches terete or nearly so. 
Upper leaf-blades rounded or cuneate at the base, short-petiolate 
or sessile; tall shrubs, 6-25 dm. high. 
Bracts entire, convex. 
Bracts crenulate, strongly compressed. 
Upper leaf-blades cordate or subcordate at the base, clasping; low 
shrub, 2-4 dm. high; bracts entire. 
. XXT. JULACEAE 
A single species. 
: XXII. Poiycarpar 
A single species. 
XRITI. AcANTHOCARPAE 
A single species. 
XXIV. OBOVATAE 
Sides of the bracts usually smooth. 
Sides of the bracts tuberculate or cristate near the base. 
XXV. CoRRUGATAE 
A — species. 
XXVIL NuTTALLiaANaR 
Sides of the bracts smooth, the bracts never fusiform. 
Leaf-blades obovate or oblanceolate-oblong; bracts broadest above 
the middle, 3-dentate at the apex. 
Leaf-blades oblong-linear or linear-oblong; bracts broadest at or below 
the middle, with usually more than 3 teeth at the apex. 
Sides of the bracts tuberculate or muricate, or, if smooth, the bracts 
fusiform. 
Leaf-blades oval or rounded-ovate, on petioles half as long as the blades 
or shorter. 
Bracts 5 mm. long, the free portion triangular-subulate, shorter 
than the united portion. 
Bracts 7-8 mm. long, the free portion orbicular-rhombic or rhombic- 
ovate, broader and longer than the united portion. 
Leaf-blades oblong-linear to broadly oblong or obovate, usually sessile 
or subsessile. 
Plants very densely white-furfuraceous throughout, the whole 
plant appearing white or whitish. 
Bracts 8-10 mm. long, short-pedicellate. 
Bracts 5-7 mm. long, sessile. 
Plants rather sparsely furfuraceous, appearing green or grayish- 
een. 
Bec fusiform, some or all of them pedicellate; leaf-blades 
oblong-linear, 2-6 mm. wide. 
Bracts never fusiform, usually ovoid, sessile or nearly so; leaf- 
blades oblanceolate-oblong to oblong. 
Plants erect; leaf-blades cuneate at the base, usually short- 
petiolate, 2-4 em. long. ; 
Plants ascending or decumbent; leaf-blades obtuse at the 
base, sessile, 1.5-2 cm. long. 
XXVII. PHYLLOSTEGIAE 
A single species. 
87. 
88. 
89, 
90. 
91. 
92. 
93. 
94, 
95. 
96. 
a 
[VorumE 21 
. Palmeri. 
. Magdalenae. 
. insularis, 
. Barclayana. 
. Sonorae. 
. hymenelytra. 
. orbicularis. 
. Torreyt. 
. Griffithsti. 
. Breweri. 
. lentiformis. 
. Parryi. 
. julacea. 
. polycar pa, 
. acanthocarpa. 
. Jonesit. 
. obovate. 
- corrugata. 
. Gardneri., 
. tridentata. 
- cuneaia, 
. neomexicana, 
. Pringlei. 
. oblanceolaia. 
. falcata, 
. Nuttallii. 
. buxifolia. 
. phyllostegia. 
