36 MICHIGAN ACADEMY OF SCIENCE. 



13. PAXICUM, Lin. Panic Grass. 



33. sanf^iinale, Lin. Belle Isle. Common. 



34. humifusum (Pers.) Kunth. Belle Isle. Frequent. 



35. Crus-galli, Lin. Barnyard Grass. Belle Isle, etc. Frequent. 



36. var. mite. Ph. Panicum Crus-(jaUi Lin. var. m^iticum Ell. Bal- 



last Grounds, Detroit. Rare. 



37. var. purpureuni, Ph. Belle Isle, waste places, etc.; the common 



form. 



38. var. Walter! (Ph.) P. Walteri Ph. Fl. Am. Sept. 1, 66: 1814. 



Low groimds near the water works. Frequent. 



39. sphserocarpon. Ell. Linden Park. Common. 



40. commutatum, Schultes. Waste places, Detroit. Rare. 



41. macrocarpon, Le Conte. Linden Park. Frequent. 



42. Scribnerianum, Nash. Linden Park. Common. 



43. pubescens. Lam. Belle Isle, etc. Frequent. 



44. lanuginosum. Ell. Grassy places under trees on Belle Isle. Frequent. 



45. Columbianum, Schribn. Belle Isle. Common. 



46. liniarifolium, Scribn. Detroit. Frequent. 



47. miliaceum, Lin. Millet. Ballast, etc. Detroit. Common. 



48. capillare, Lin. Belle Isle, etc. Common. 



14. CH^TOCHLOA, Scribn. Foxtail Millets. 



49. glauca (Lin.) Scribn. Belle Isle, etc. Common. 



50. viridis (Lin.) Scribn. Belle Isle. Common. 



51. Italica (Lin.) Scribn. Belle Isle. Rare. 



52. var. Germanica (Mill.) Scribn. Panicum Germanicum Mill. Gard. 



Diet., Ed. 8, No. 1, 1868. Ballast, etc., Detroit. Rare. 



15. CENCHRUS, Lin. Bur Grass. 



53. tribuloides, Lin. Belle Isle, etc. Frequent. 



16. ZIZANIA, Lin. Wild Rice. 



54. aquatica, Lin. Marshy grounds, etc., Belle Isle. Frequent. 



17. HOMALOCENCHRUS, Mieg. 



55. Virginicus (Wild.) Britt. White Grass. Woods on Belle Isle. Common. 



56. oryzoides (Lin.) Poll. Rice Cut-grass. Borders of canals on Belle 



Isle. Rare. 



18. PHALARIS, Lin. 



57. arundinacea, Lin., var. picta, Lin. 



The familiar ribbon grass of the garden is sometimes found in waste 

 grounds. 



58. Canariensis, Lin. Canary Grass. Waste grounds, Detroit. Common. 



19. MUHLENBERGIA, Schreb. 



59. Mexicana (Lin.) Trin. Near Palmer Park. Common. 



60. sylvatica. ToVrey. Frequent on the south shore of Belle Isle. 



61. diffusa, Schreb. Woods on Belle Isle. Common. 



20. PHLEUM. Lin. 



62. pratense, Lin. Timothy. Nimble Will. Woods on Belle Isle. Common. 



21. ALOPECURUS, Lin. Foxtail. 



63. geniculatus, Lin., var. aristulatus (Mx.) Torr. Belle Isle shores, etc. 



Common. 



22. SPOROBOLUS, R. Br. 



G4. neglectus, Nash. Drop-seed Grass. Sandy grounds near the Water 



Works. Rare. 

 65. cryptandrus (Torr) A. Gr. Rush Grass. Sandy shores at Detroit. 



Frequent. 



