34 NORTH AMERICAN FLORA 
Flower-buds, and usually leaf-buds, scaly-stro- 
bilaceous. 
Corolla campanulate or rotate-campanulate. 
Calyx-lobes foliaceous. 
coe open to the base on the lower 
side. 
Corolla not open to the base on the 
lower side. 
Calyx-lobes small, minute or obsolete. 
Upper corolla-lobe interior; calyx-lobes 
small, but prominent; leaves persis- 
tent, the blades leathery. 
Upper corolla-lobe exterior; calyx-lobes 
minute; leaves deciduous, the blades 
membranous. 
Corolla urceolate, globose-urceolate, or cylin- 
draceous. 
Flower-buds and leaf-buds not scaly-strobilaceous. 
Corolla campanulate to urceolate. 
Corolla saucer-shaped. 
Calyx persistent; corolla-lobes rounded; cap- 
sule depressed. 
Calyx deciduous; corolla-lobes acute; cap- 
‘sule ovoid. 
Capsule loculicidal or marginicidal. 
Anther-sacs opening by apical pores or chinks or by chinks 
above the middle; capsule loculicidal. 
Calyx-lobes imbricate, at least in the bud. 
Corolla urceolate, ovoid, pyramidal, conic, or cylin- 
draceous; anthers fixed nearly at the base. 
Capsule depressed; anther-sacs opening by apical 
pores or chinks. 
Capsule-walls double, the outer 5-valved, the 
inner 10-valved. 
Capsule-walls single, 5-valved. 
Anthers awned; panicles terminal. 
Anthers awnless; panicles axillary. 
Flower-stalks scaly above the base; 
calyx-lobes broad, of an ovate type; 
panicles axillary along the branches. 
Flower-stalks scaly only at the base; 
calyx-lobes narrow, of an oblong or 
lanceolate type; panicles 2 to several 
at the ends of the branches. 
Capsule elongate; anther-sacs opening by chinks 
above the middle. 
Corolla campanulate; anthers fixed nearly at the apex. 
Style slender; corolla-lobes much shorter than the 
tube; leaf-blades broad. 
Style ovoid or conic; corolla-lobes as long as the tube 
or longer; leaf-blades narrow. 
Calyx-lobes valvate or separated in the bud. 
Anther-sacs awned; capsule-sutures not thickened. 
Awns of the anther-sacs ascending; seeds smooth 
and shining. 
Corolla urceolate; anthers oval; 
scarcely dilated at the base. 
Corolla campanulate; anthers narrow; filaments 
abruptly much-dilated at the base. 
Awns of the anther-sacs deflexed; seeds reticulate 
or with a loose coat. 
Flowers in terminal compound panicles; fila- 
ments subulate, straight or nearly so. 
Flowers in axillary simple raceme-like panicles; 
filaments much flattened, linear-lanceolate to 
lanceolate, sigmoid-curved. 
Anther-sacs awnless; capsule-sutures thickened. 
Filaments appendaged. 
Style fusiform; corolla of an urceolate type; 
leaf-blades with intra-marginal veins; sepals 
persistent. 
Style columnar; corolla of a campanulate type; 
leaf-blades without intramarginal veins; 
sepals deciduous. 
Filaments unappendaged. 
Capsule longer than thick, prominently angled; 
lepidote shrubs with persistent leaves; flowers 
in axillary clusters. 
filaments 
15. 
16. 
17. 
18. 
19, 
20. 
21. 
22. 
23. 
24, 
25. 
26. 
27, 
28. 
29. 
30. 
[VoLumME 29 
. THERORHODION. 
10. 
AZALEASTRUM, 
. RHODODENDRON. 
. BILTTA. 
. MENZIESIA. 
. PHYLLODOCE. 
KALMIA, 
KALMIELLA. 
CHAMAEDAPHNE. 
EuBOTRYS. 
LEUCOTHOE. 
OREOCALLIS, 
OxyDENDRUM. 
CASSIOPE. 
HARRIMANELLA. 
ANDROMEDA, 
ZENOBIA. 
PIERIS. 
AMPELOTHAMNUS. 
DESMOTHAMNUS. 
NEOPI&RIS. 
XOLISMA. 
