286 MILKWEED FAMILY. 



6. MANDB VILLA. (H. J. Mandeville, British minister at Buenos 

 Ay res.) Plants from the warm parts of America, one not rare as a 

 conservatory climber. 



M. suaveolens, Lindl. (ECHITES SUAV&OLENS.) CHILE JESSAMINE. 

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

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

 racemed very fragrant flowers, the white corolla with ample 5-lobed 

 border, 2' broad. 



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



T. diff6rme, 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 KHYNCHOSPKRMUM) 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. ASCLEPIADACEJE, 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 (monad el- 

 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 5-parted calyx and corolla. Flowers 

 in simple umbels, fruit a pair of pods (fotUcles) containing numerous flat 

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

 end. 



1. ASCLEPIAS. 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-like 

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

 surrounding and partly adhering to the very thick 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 o^ 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. ASCLEPIODOEA. Differs from Asclepias in having the lobes of the corolla ascending 



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

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

 Leaves alternate. 



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

 and the flowers always greenish. Leave? generally alternate, 



