286 MILKWEED FAMILY. 



6. MANDEVrLLA. (/7. .7. Mandeville, British minister at Buenos 

 AjTt's.) Plants from the warm parts of America, one not rare as a 

 conservatory climber. 



M. suayeolens, Lindl. (Echites suavJiolens. ) Chile Jessamine. 



Slender, woody-stemmed, tall twiner, with thin, oblong or ovate heart- 

 shaped, pointed, opposite leaves, and slender peduncles bearing a few 

 "acemed very fragrant flowers, the white corolla with ample 6-lobed 

 border, 2' broad. 



7. TRACHELOSPERMUM. (Greek: neck, seed.) 11 



T. diffdrme, Gray. Low grounds from Va. S. and W., is a barely 

 woody twiner, the flowering branches herbaceous and downy ; leaves 

 thin, oval-lanceolate, pointed, or sometimes linear, narrowed into a petiole ; 

 flowers ^' long, in cymes, greenish-yellow, all summer. 



T. (or Rhynchospermum) jasminoldes, Lem. Handsome greenhouse 

 climber from China ; leaves thick, ovate, acute and entire and often revo- 

 lute; flowers white and very fragrant, in a straggling cyme or panicle. 



LXXIII. ASCLEPIADACEiE, MILKWEED FAMILY. 



Plants with milky juice, leaves, pistils, fruits, and seeds 

 nearly as in the preceding family; but the anthers more con- 

 nected with the stigma, their pollen collected into firm waxy 

 or granular masses (mostly 10), the short filaments (monadel- 

 phous except in the last genus) commonly bearing curious 

 appendages behind the anthers, forming what is called a crown, 

 and the corolla more commonly valvate in the bud. The flowers 

 are rather too difficult for the beginner readily to understand 

 throughout. For a particular study of them the Manual must 

 be used. 



§ 1 . Erect herbs, with ordinary foliage, and deeply oparfed calyx and corolla. Flowers 

 in simple umbels. Fruit a pair of pods {fo,l6Cles} containing numerous flat 

 seeds furnished with a comu (Lessons, Fig. 417) or long tuft of soft down at one 

 end. 



1. ASCLEt'IAS. Corolla reflexed. Stamens with their short filaments monadelphous in 



a ring or tube, bearing behind each anther a curious erect and hood-like or ear-lil^e 

 appendage, with a horn projecting out of the inside of it ; the 5 broad anthers closely 

 surrounding and partly adhering to the very thicic stigma, a membranous appendage 

 at their tip inflected over it. Each of the 2 cells of the anther has a firm waxy pear- 

 shaped pollen mass in it ; and the two adjacent masses from two contiguous anthers 

 are suspended by a stalk from a dark gland ; these .5 glands, borne on the margin of 

 the flat top of the stigma, stick to the legs of insects, and are carried off, each gland 

 taking with it 2 pollen masses, the whole somewhat resembling a pair of saddle bags. 

 Leaves mostly opposite. . 



2. A8CLEPI0D0KA. Differs from Asclei]ias in having the lobes of the corolla ascending 



or spreading, and the hoods without horns and widely spreading and somewhat in- 

 curved and slipi)er-shaped, the cavity divided at the apex by a crest-like partition. 

 Leaves alternate. 



3. ACEKATES. Like Asclepias, but no horn or crest in the hoods or ear-like appendages. 



and the flowers always greenish. Leaves generally alternate. 



