ORDER 100. ASCLEPI ADAGES. 



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. "*> ) Lvs. opp. (Mandevilla, Lindl.) 

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



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

 E. umbcllata Jacq. and E. Andrewsii Chapm. are indigenous in S. Fla. 



6. ALLAMANDA CATHARTICA. Shrub from Guyana, with slender 

 branches, oblong thin-pointed leaves, and bright-yellow flowers 2^ 3'. Cor. runnel-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. 5 Lvs. lanceolate, acute both ways, thick and Jeathery, 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. 51 Of, very handsome. 



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



ges of the anthers exserted ; flowers fragrant. India. 



ORDER C. ASCLEPLADACE^E. ASCLEPIADS. 



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



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. Ovaries 

 2, forming follicles in fruit. 



Fio. 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 mattes 

 suspended from the glands. 5. A mature follicle. 

 6. Vertical section of P. phytolaccoides showing 

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



Stems erect, leafy, herbaceous. ..(a) 

 Stems climbing, often shrubby... (r) 



Stems low, leaves fleshy, all radical. . .STAPELIA. 12 



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



a No horns in the crown. b Petals reflexed or spreading. ACERATS. 2 



b Petalserect PODOSTIGMA. 3 



c Corolla salver-form, white, the crown in the bottom of the tube STKPHANOTIS. 10 



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



t Corolla segments erect, crown 5-leaved, <l each leaflet 2-awned ENSLKNIA. 4 



-^leaflets awnlmw.... . ..MKTASTKI.MA. 5 



