ORDER 1 00. -ASCLEPI AD ACE /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. coraous. "*> J> Lvs. opp. (Mandevilla, Lindl.) 

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



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

 E. umbellata Jacq. and E. Andrwsil 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. funnel-bell- 

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



%, N. ODOIUTM. 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, oftet 



twining. Leaves opposite (rarely whorled 

 or scattered), without stipules, entire. 

 Floiccrs 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. 



FIG. 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. pbytolaccojdes 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. 



a A little horn in each liood of the crown. Petals reflexed ASCLEFIAS. 



o No horns in the crwn. b Petals reflexed or spreading ACERATES. 



b Petals erect PODOSTIGMA. 



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



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



Orolla segments erect, crown 5-leav C d,-<? each leaflet 2-aw-ned ENSLEIOA. 



~,l leaflets awnlass MKTASTKI.MA. 



