CENT. VI. 89 



521. DiALioN R. (n. gr.) diff. Heliotrop. cor. 

 villosis, tubo conico, limbiis plicis dentif. inter 

 lac. sem. 4 villosa,j^. spicatis. 



522. Dialion undulatum Raf. Heliotr, do 

 Vah] &c. Lithosp. hispidum Forsk — Dicho- 

 tome shrub of Egypt. 



523. ScoRPiANTHEs Raf. diff'. Heliotr. cor. in- 

 fundib. faux pervia, dentis inter lobis, sem. vil- 

 losa,^. spic. ** 



425. Scorpianthes lineatum Raf. Hel. do 

 Vahl &c. Lithosp. heliotropoides Forsk — dicho- 

 tome shrub of Arabia. 



525. Peristima Raf. (around stig.) diff. He- 

 liotr* cor. faux nuda, limbo piano, stylus medio 

 incrassato, annulo lato circumdatus sub stigma 

 quod bifidus est, sem. baccatis coalitis inter bac- 

 ca 4ang- 4sp. — hardly of same family, very near 

 Ehretia. 



526. Peristima hicolor Raf. Heliotr. bacca- 

 tum Forsk. Vitm. caule frutescens prostrato, fol. 

 obi. hispidis — Arabia, small low shrub, flowers 

 tube yellow, limb white. 



527. Besides.these frutescent N, G. there are 

 others herbaceous included in Heliotropiuni, 

 whereof Tiaridium of Lehman is one including 

 many sp. blended in HeL indiciim or akin there- 

 to, with fruit bifid formed of 2 coalescent seeds, 

 our American sp. is quite distinct even in Ge- 

 nus! see 531. 



528. Synzistachifm Raf. diff. Heliotr. cor. 

 tubo clavato iongissimo, limbus 5fidus, fruct. 

 2{3iirtibilis 2sp. — akin to Messersmidia, type S. 

 periiviamim R. Hel. synzist. R. P. auct. — H. 

 microstachium has the same fruit, but how is co- 

 rolla? several other Peruvian sp. have very pe- 

 culiar habit by flowers corymbose and will pro- 

 bablv form other Genera, The H* pinnalum 



12 



