328 ASCLEPIADACEAE. 
STEPHANOTIS. 
(Family Asclepiadaceae). 
Tender twining woody plants 
with milky sap: evergreen. Stems 
somewhat 4-sided, moderate: pith 
angled, spongy. Buds (often sup- 
pressed) solitary, small, naked. 
Leat-scars opposite, raised, half- 
round: bundle-trace 1, indistinct: 
stipule-scars minute and round, 
or the stipules present as small 
points. Leaves simple, entire, 
petioled, grooved near the apex, 
and with a few minute glands at 
top of the petiole. 
Because of its rich green leaves 
and, particularly at night, very 
fragrant flowers, Stephanotis is a 
popular climber where the cli- 
mate permits its cultivation. 
No phase of out-of-doors botany 
exceeds in interest the study of 
pollen interrelations between flow- 
ers and certain groups of insects and Knuth’s compendious 
Handbuch der Bliitenbiologie affords a ready key to under- 
standing many queer floral structures besides giving a mean- 
ing to those that are most familiar. 
Glabrous: twigs green and glossy. S. floribunda. 
