G6 MICHIGAN ACADEMY OF SCIENCE. 



335. AXTENNARIA, Ga-itii. Cudweed. 



798. neodioiea, Greene., var. attenuata, Fernald. Xear Linden Park. Rare. 



799. neglecta, Greene. Common on Belle Isle and the main land also. 



800. oceidentalis, Greene. Linden Park and Palmer Park. Frequent. 



801. fallax. Greene. Linden Park and Palmer Park. Frequent. 



802. arnoglossa, Greene., var. anibigens, Greene. Linden Park and Palmer 



Park. Frequent. 



336. GXAPHALIUM. Liu. 



803. obtusifolium, Lin. Life Everlasting. On Belle Isle. Common. 



804. uliginosum, Lin. On Belle Isle. Frequent. 



805. purpureum, Lin. At Linden Park. Rare. 



337. SILPHIUM, Lin. 



806. laeiniatum, Lin. Rosinweed. 



807. terebinthinaceum, Jacq. 



Both species of Rosinweed are frequent near Linden Park. 



338. AMBROSIA. Lin. Ragweed. 



808. trifida, Lin. Waste places. Common. 



809. artemisiaefolia, Lin. Common on Belle Isle. 



339. XAXTIIIU]\L Lin. Cocklebur. 



810. spinosum, Lin. Waste places. Rare. 



811. strumarium. Lin. Waste places, also Belle Isle. Frequent. 



812. Canadense, 3Iill. Shores of Belle Isle. Common. 



813. var. echinatum (Murr.) A. Gr. Linden Park. Frequent. 



340. HELIOPSIS, Pers. 



814. scabra, Dun. Dry grounds on Belle Isle. Rare. 



341. RUDBECKIA. Lin. 



815. hirta, Lin. Yellow Daisy. Fields, etc., on main land. Common. 



342. HELIAXTHUS, Lin. Sun-flower. 



816. annuus. Lin. Waste grounds at Detroit. Common. 



817. Maximiliani, Schrad. Waste grounds. Rare. 



818. giganteus, Lin. Belle Isle, etc. Common. 



819. hirsutus, Raf. On main land. Rare. 



343. COREOPSIS, Lin. 



820. tinctoria, Xutt. Tickseed. A form with small heads and with rays 



yellow throughout. Waste places. Rare. 



821. tripteris, Lin. iMoist thickets near Palmer and Linden Parks. Com- 



mon. 



344. BIDEXS. Lin. Bur marigold, Beggar ticks. 



822. cernua, Lin. Common and variable. Belle Isle, etc. 



823. var. Bidens (Lin.) Coreopsis Bidens Lin. Sp. PI. 908: 1753. 

 Bidens cernua var. elliptica Wiegand. Belle Isle. Rare. 



824. connata. ]Muhl. Belle Isle, etc. Common and variable; leaves un- 



divided, incisely-cut or serrate (the type) ; or pinnately three 

 divided with the terminal division petioled, — 



825. var. petiolata (Xutt.) B. petiolata Nutt. Jour. Acad. Philad. 

 7, 99; 



826. in. var. anomala, the awns are upwardly barbed. 



827. comosa (A. Gr.) Wiegand. Belle Isle and on the main land. Common. 



828. melanocarpa, Wiegand. Belle Isle and on the main land. Common. 



829. frondosa, Lin. Belle Isle, etc. Common. 



830. var. puberiila. Wiegand. On the main land. Common. 



831. trichosperma (Mx.) Britt.. var. tenuifolia (A. Gr.) Britt. (?) A 



peculiar form found on Belle Isle. It has the outer linear involucre 

 bracts twice longer than the inner and equal to the rays in length. 



832. aristosa (Mx.) Britt. Belle Isle. Rare. 



