ORDER 100. ASCLEPIADACE^E. 



271 



5. ECHITES, Br. Cor. funnel- or salver-form, not appendaged, lobes 

 convolute, bearing the subsessile anthers in the throat ; 5 glands at base of 

 ovaries. Foil. 2, slender. Sds. comous. ^ 5 Lvs. opp. (Mandevilla, Lindl.) 

 E. SUAVEOLENS. Climbing ; leaves cordate-ovate, acuminate, shorter than the axillary 



or terminal racemes ; flowers fragrant, 2'. 8. America. 

 E. umbellata Jacq. and li. Amlrewxii Chapm. are indigenous in S. Fla. 



6. ALLAMANDA CATHARTICA. Shrub from Guyana, with slendei 

 branches, oblong thin-pointed leaves, and bright-yellow flowers 2^3'. Cor. funnel-bell- 

 form, lobes 5, rounded, throat appendaged. Ova. 1, becoming a prickly, 1-celled capsule. 



7. NERIUM, L. OLEANDER. Corolla salver-form, convolute, throat 

 crowned with 5 cleft scales. Anth. arrow-shaped, tipped with a long hairy 

 bristle. > Lvs. lanceolate, acute both ways, thick and leathery, in 2's or 3's. 



1 N. OLEANDER. Leaves lanceolate ; scales of the crown each of 3 or 4 pointed unequl 

 teeth; fls. clustered, inodorous, often double, 2'. Palestine. 5 lOf, very handsome. 



8 N. ODORUM. Leaves linear-lanceolate ; scales of the crown each 4-7-cleft ; appenda- 

 ges of the anthers exserted ; flowers fragrant. India. 



ORDER C. ASCLEPIADACE^E. ASCLEPIADS. 



Plants (chiefly herbs in the United States) with a milky juice, often 



twining. Leaves opposite (rarely whorled 

 or scattered), without stipules, entire. 

 Flowers generally umbellate, 5-parted, re- 

 ! gular, the sepals and also the petals united 

 at base, both valvate in aestivation. Sta- 

 mens united, adherent to and covering 

 the fleshy mass of the two united stig- 

 mas. Pollen cohering in masses. Ovarie* 



2, forming follicles in fruit 



Fro. 530. 1. Asclepias cornuti. 2. A flower, the 

 petals and sepals reflexed. and the corona erect. 



3. One of the segments of the corona with the 

 horn bent, inwardly. 4. A pair of pollen masses 

 suspended from the glands. 5. A mature follicle. 

 6. Vertical section of P. pr-ytolaccoides showing 

 the two ovaries. 7. Lobe and horn of (he corona 



Stems erect, leafy, herbaceous ..(a) 

 Stems climbing, often shrubby ..(<) 



Stems low, leaves fleshy, all radical. . .STAPKLIA. U 



a A little horn in each hood of the crown. Petals reflexed ASCLKPIAS. 1 



a No horns in the cr.wn. b Petals reflexed or spreading. ACERATES. 2 



b Petals erect PODOSTIGMA, 3 



e Corolla salver-form, white, the crown in the bottom of the tube STEPHANOTIS. 10 



Corolla wheel-form, flattish, the lobes spreading... () 



c Corolla segments erect, crown 5-leaved, rf each leaflet 2-awned. ENSLRHIA. 4 



d leaflet! awnlsag MKTAKTKI.X v B 



