324 



LXXXIX. CYTINEiB. 



Flowers sepai'ate. Perianth superior, 4-5 -parted. Stamens S or more, growing on a 

 central column. Ovary of one cell, with many seeds, on parietal placentas. No Leaves. 



710. CYTINTJS. 

 1. Hypocistis. p. 5. s. Fr. It. Parasite on roots of Cisti. 



XC. AKISTOLOCHI^. 



Flowers complete. Perianth superior, 3-cleft or obliquely truncate. Stamens 6-13, inserted 

 on the top of the ovary, sometimes connate with style and stigma. Ovary 3-6-ceUed, with 

 numerous seeds, on central placentas. 



711. ARISTOLOCHIA. 



A. Flowers solitary. 



1. altissima. Stem shrubby, climbing ! 

 L. perennial, quite smooth, cordato-oblong. 

 Lip of Cor. short, retuse. iv. 5, 6. Hedges. 

 e. Sicily. 



2. rotunda. Root nearly globose. Stem 

 nearly simple, herbaceous, erect. L, some- 

 what triangulari- cordate, on very short stalks. 

 Lip of Cor. emarginate. Caps, globose, p. 

 4, 5. Bnj bushy, s. Fr. Trieste. It. 



8. pallida. Root nearly globose. Stem 

 simple, somewhat erect. L. triangulari-cor- 

 date, on stalks which exceed flower-stalks. 

 Lip of Cor. acute. Fr. oval, attenuate, p. 

 8, 4. Bushy, inner Cam. Trieste. It. 



4. lon^a. Root long, simple, cylindrical. 



Stem branched, herbaceous. L. cordate, quite 

 entire, stalked. Lip of Cor. somewhat acute. 

 Caps, oval, attenuate, p. 5. Fields, vine- 

 yards, s. Fr. Sic. 



5. Pistolochia. Roots bundled. StemS 

 numerous, branched, decumbent. L. cordate, 

 crenate, rough, on short stalks, p. 5-9. Bar- 

 ren stony, mdt. Fr. 



B. Flowers clustered. 



6. Clematitis. Root creeping. Stem sim- 

 ple, erect. L. cordate, stalked, smooth, p. 

 5, 6. Borders, vineyards. Eng. very rare. 

 m. and s. Europe. 



712. ASARUM. 



1. europeeum. L. reniform. p. 3, 4. 

 Shade. Eng. very rare. m. and s. Eur. 

 occasionally. 



XCI. EMPETRE^. 



Flowers separate, inferior. Petals 8, alternating with sepals. Stamens 3, free, opposite to 

 sepals, inserted on receptacle. Ovary on a fleshy disc, 3-6-ceIled. Cells 1-seeded. Stigma with 

 as many rays as cells to ovary. 



713. EMPETRUM. gins meeting in a white line beneath. Berries 



black. s.S. 5. Mountain heaths. Not in floras 

 1. nigrum. L. linear-obtuse ; their mar- of Rome or Naples. 



