172 NORTH AMERICAN FLORA 
I. PIsonrzas 
Stamens included; anthocarp without stipitate glands. 
Stamens 5-— 10; limb of the staminate perianth little or not at all 
broader than the tube. 
Stamens 25-30; limb of the staminate perianth much broader than 
the tube, 
Stamens exserted. 
Anthocarp fleshy, without glands; flowers cymose, unisexual; stems 
unarmed. 
Anthocarp coriaceous, bearing numerous stipitate glands. 
Flowers unisexual, cymose; stigma penicillate; stems often armed 
with spines. 
Flowers perfect, 
unarmed. 
umbellate; stigma depressed-capitate; stems 
. . TI. SALPIANTHEAE 
A single genus in North America. 
IIT. BouUGAINVILLEAE 
A single genus. 
IV. CoLiGNONIEAE 
A single genus in North America. 
V. MiraBILEAE 
Flowers borne each upon the costa of a broad foliaceous bract. 
Flowers variously arranged but never borne upon the costa of a bract. 
Stamens 9-17; peduncles elongate after anthesis, penetrating the 
soil, the fruit hypogaeous. 
Stamens usually 1~5; peduncles never penetrating the soil. 
Anthocarp with 3-5 scarious wings. 
Free portion of the perianth campanulate, constricted above 
the ovary; stamens 2 or 3, the filaments free from the peri- 
anth; flowers umbellate. 
Free portion of the perianth tubular-funnelform, not con- 
stricted above the ovary; stamens 5 or 6, adherent to the 
perianth-tube; flowers solitary or geminate. 
Anthocarp not winged, or rarely with coriaceous wings. 
Anthocarp lenticular, the margins usually dentate and re- 
curved, the dorsal surface bearing 2 rows of stipitate glands; 
flowers in 3’s, subtended by a 3-parted involucre. 
Anthocarp not lenticular, never with dentate margins. 
Flowers capitate, the head surrounded by an involucre of 
numerous distinct bracts; perianth funnelform, with a 
long tube; stamens long-exserted, usually 5. 
Flowers not capitate and surrounded by an involucre of 
numerous distinct bracts, each flower subtended by 
2 or 3 bracts, or the bracts united. 
Involucre of distinct bracts. 
Flowers usually solitary; bracts herbaceous, per- 
sistent; perianth with a conspicuous, often much 
elongate tube. 
Flowers not solitary, usually cymose, racemose, or 
umbellate; bracts scarious, usually deciduous. 
Anthocarp with 5 or fewer angles or costae, ob- 
pyramidal or clavate; free portion of the peri- 
anth campanulate. 
Anthocarp 10-costate; free portion of the peri- 
anth funnelform. 
Flowers racemose; anthocarp asymmetric, 
clavate, without conspicuous glands. 
Flowers not racemose; anthocarp symmetric. 
Anthocarp clavate, exalate, with con- 
spicuous stipitate mucilaginous glands; 
plants subscandent, slender, often fruti- 
cose at the base; leaves cauline, the 
blades thin. 
Anthocarp turbinate or biturbinate, often 
with a horizontal wing, eglandular; 
plants erect, stout, herbaceous; leaves 
mostly basal, the blades coriaceous. 
Involucre gamophyllous. 
Anthocarp 5-sulcate, conspicuously constricted at 
the base; involucre strongly accrescent after an- 
thesis, 1—5-flowered; free portion of the perianth 
campanulate or broadly short-salverform. 
Anthocarp neither sulcate nor constricted at the 
base, or rarely slightly constricted. 
{VoLUME 21 
. NEEA. 
. CEPHALOTOMANDRA, 
TORRUBIA. 
4. PISONIA. 
5. PIsoNIELLA. 
10. 
ll. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
. SALPIANTHUS. 
. BOUGAINVILLEA. 
. COLIGNONIA. 
. HERMIDIUM. 
OKENIA. 
AMMOCODON. 
. SELINOCARPUS. 
WEDELIELLA. 
NYCTAGINIA. 
ACLEISANTHES. 
BoERHAAVIA. 
CyPHOMERIS. 
CoMMICARPUS. 
ANULOCAULIS. 
ALLIONIA, 
