156 MICHIGAN ACADEMY OP SCIENCE. 



479. C. confinis, Nuti. Common. 



480. Glyceria Canaden.sis. Trin. 



481. G. grandis, Wats. 



482. Osmunda Claytoiiiana, L. 



C. Borders of streams, ponds and lakes. 



483. Anemone Pennsylvanica, L. 



484. Ranunculus septentrionalis, Poir. 



485. Cardamine rhomboidea, DC. 



486. C. rhomboidea purpurea, Torr 



487. C. pratensis. L. 



488. C. Pennsylvanica, Aluhl. 

 48&. Nasturtium palustre, DC. 



490. Elodes campanulata, Pursh. 



491. Penthorum sedoides, L. 



492. Proserpinaca palustris. L. 



493. Ludwigia palustris. Ell. l.imose. 



494. Hydrocotyle umbellata, L. Limose and aquatic. 



495. Gnaphalium uliginosum, L. Dried puddles. 



496. Lobelia Kalmii, L. Amphibious. 



497. Polygonum amphibium, L. Amphibious. 



498. P. hydropiperoides, Michx. 



499. Sali.\ nigra. Marsh. Borders of streams. 



500. S. amygdaloides. And. 



501. S. lucida, Muhl. 



502. S. longifolia, Muhi. 



503. S. petiolaris gracilis, Auders. 



504. Populus monilifera, Ait. 



505. Pontederia cordata, 1j. Mostly in shallow water. 



506. Alisma Plantaga, L. Amphibious, 



507. Sagittaria variabilis, Engelm. Amphibious. 



508. Sagittaria variabilis angustifolia, Engelm. 



509. S. heterophylla, Pursh. Limose and aquatic. 



510. S. heterophylla rigida, Engelm. 



511. S. heterophylla angustifolia. Engelm. 



512. Cyperus diandrus castaneus, Torr. 



513. Eleocharis ovata, R. Br. 



514. E. tenuis, Schultes. 



515. E. acicularis, R. Br. Beds of dry pools in autumn. 



516. Scirpus pungens, Vahl. Shallow water. 



517. S. iacustrls, L. Shallow water in lakes. 



518. S. debilis, Pursh. Muddy shores of lakes. 



519. Care.x straminea, Willd. 



520. C. straminea mirabilis. Tuck. 



521. Leersia oryzoides, Swartz. In streams. 



522. Zizania aquatica, L. In streams. 



523. Alopecurus geniculatus aristulatus, Torr. 



524. Glyceria fluitaus, R. Br. Shallow water. 



525. Equisetum sylvaticum, J.,. 



526. E. limosum, L. 



527. Marchantia polymorpha, L. 



D. Aquatics. 



528. Brasenia peltata, Pursh. Lake Minnewaukon. 



529. Nympha?a reniformis, DC. Ponds and lakes. 



530. Nuphar advena, Ait. f. 



531. Myriophyllum verticillatum, L. Lake Minnewaukon. 



532. Utricularia vulgaris, L. Ditches, ponds and lakes. 



533. U. gibba, L. Lake Minnewaukon. 



534. Ceratophyllum demersum. L. Lake Minnewaukon. 



535. Spirodela polyrrhlza, Schleid. 



536. Potamogeton natans, L. Ponds. 



537. P. hybridus, Michx. 



538. P. fluitans. Roth. 



