170 RUBIACEAE, 
1. Flowers and fruit in racemes. C. Bungei. 
Flowers and fruit in panicles. 2, 
2. Pods about 5 mm. in diameter: leaves mostly angled: 
twigs hairy. 3. 
Pods about 8 mm. in diameter: seeds pointed: leaves rarely 
angled: twigs glabrous. 5. . 
Pods fully 10 mm. in diameter: seeds obliquely truncate: 
leaves often angled. (Warder’s catalpa). C. speciosa. 
3. Mature leaves glabrous. (Japanese catalpa). C. ovata. 
Mature leaves pubescent. (Teas’ catalpa). 4. 
4. Leaves green. x C. hybrida. 
Leaves purple while young. x C. hybrida purpurea, 
. Tree. °C Common “catalpa) 71 
Shrub, or usually grafted as a standard. C. bignonioides nana. 
6. Leaves green. C. bignonioides. 
Leaves yellow. C. bignonioides aurea. 
Gt 
CuiLopsis. Desert Willow. 
Deciduous shrubs or small trees with soft dark brown wood 
with diffused rather large ducts and fine but evident pale medul- 
lary rays; slender somewhat angled twigs; small angled pale 
homogeneous pith; whorled or opposite or even scattered raised 
crescent-shaped small leaf-scars with a single bundle-trace; no 
stipule scars; small compressed roundish buds with 2 nearly 
valvate outer scales; simple subsessile willow-like leaves; rather 
large trumpet-shaped perfect gamopetalous flowers in terminal 
racemes; and long slender cylindrical 2-valved capsules and thin 
winged seeds, long-ciliate especially at the ends. 
Leaves linear to narrowly lanceolate, entire. C. saligna. 
Family RUBIACEAE. Coffee Family. 
A large heterogeneous family, largely of the tropics, yielding 
coffee, quinine, ipecac, etc. Bouvardias are among the useful 
bright-flowered species grown under glass. 
CEPHALANTHUS. Button Bush. 
Deciduous shrubs with moderately slender roundish twigs; 
rather 4-sided homogeneous pale brown pith; low half-round 
