46 NYOTAGINACEAE. 
BOUGAINVILLEA. 
(Family Nyctaginaceae). 
Scrambling shrubs, often climb- 
ing to considerable heights where 
hardy: deciduous. Shoots moder- 
ate, terete becoming irregularly 
angular or ridged when dry: pith 
minute, indistinct. Buds _ super- 
posed, the upper developing into 
a curved spine, the lower rather 
small, ovoid or oblong, hairy, with 
2 exposed scales. lLeaf-scars al- 
ternate, broadly crescent-shaped 
to nearly round, much raised: 
bundle-traces about 5, very indis- 
tinct: stipule-scars lacking. 
Bougainvilleas, which produce 
thick almost tree-like short basal 
trunks in tropical countries, form 
brilliant covers for pergolas, walls 
or even houses where they can be 
used in the open, the showy bracts 
that surround their rather in- 
conspicuous flowers ranging from magenta to terra-cotta. 
In common with other woody members of their family, 
they produce several zones of woody bundles between the pith 
and cortex of the stem, these occurring in a mass of conjunc- 
tive tissue as it has been called. The result is an appearance 
somewhat like that of a monocotyledonous or “endogenous” 
stem, in cross section. The literature of this, and of com- 
parable anatomical facts for other families, has been assem- 
bled in Solereder’s nonpenstaee Systematic Anatomy of the 
Dicotyledons. 
Very hairy, scrambling. B. spectabilis. 
Glabrate, more bushy. (1). B. glabra. 
