MICHIGAN ACADEMY OF SCIENCE. 
93 
Cruet ferae (Mustard Family). 
Lepidium virgimeum L. Peppergrass. 10. In the aspens. 
Lepidium apetalum Willd. In the aspens. 
Capsella bursa-pastoris (L.) Medic. Shepherd’s Purse. 360. In an 
abandoned field. 
Brassica arvensis (L.) Ivtze. Mustard- 489. Rare, along roads. 
Sisymbrium altissimum L. Tumble Mustard. Collected by Mr. Loew in 
1910. 
Radicula palustris hispida (Desv.) Robinson. Marsh Cress. 233. In the 
Iris association and in willow thickets. 
Cardamine pennsylvanica Muhl. Collected along Bessey Creek by Miss 
M. Packer and Miss A. K. Dietz. 
Arabis glabra (L.) Bernh. Tower Mustard. 248, 325. In the aspens. 
Sarraceniaceae (Pitcher-plant Family). 
Sarracenia purpurea L. Pitcher Plant. 23. Chamaedaphne bogs. 
Droseraceae (Sundew Family). 
Drosera rotundifolia L. Round-leaved Sundew. 286. In cedar bogs. 
Crassuiaceae (Orpine Family). 
Sedum acre L. Mossy Stonecrop. Found by botany class in 1911. 
Saxifragaceae (Saxifrage Family). 
Mitella nuda L. Bishop’s Cap. 91, 285. Common in cedar bogs, tho 
also occurring in beech-maple woods. 
Ribes cynosbati L. Prickly Gooseberry. 301. A dominant species in 
the bramble association and occurring also in willow thickets and 
cedar bogs. 
Ribes floridum L’Her. Wild Black Currant. Loew 1910. 
Ribes hudsonianum Richards. 295. Rare, in a cedar bog. 
Ribes lacustre (Pers.) Poir. Swamp Black Currant. Loew 1910. 
Ribes prostratum L’Her. Skunk Currant. 430. Willow thicket at the 
edge of a bog near Vincent Lake. 
Ribes triste albinervium (Michx.) Fernald. Swamp Red Currant. 282. 
In cedar bogs. 
Hamamelidaceae (Witch-Hazel Family). 
Hamamelis virginiana L. Witch Hazel. Found by Mr. Loew 1910. 
Rosaceae (Rose Family.) 
Spiraea salicifolia L. 394. In willow thickets and invading in Chamae- 
daphne bogs. 
Pyrus arbutifolia (L.) L. f. Chokeberry. 422. A dominant species in 
certain bog thickets. 
Pyrus arbutifoli^ atropurpurea (Britton) Robinson. 29. With the above 
but more frequent as an invader in the Chamaedaphne association. 
Pyrus melanocarpa (Michx.) Willd. 300. In cedar bogs. 
Pyrus americana (Marsh.) DC. Mountain Ash. 443. Generally common 
in the Picea-Ahies association and present in cedar bogs. ;.q 
