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. 

 Leal-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. 



