78 THE CAYUGA FLORA. 



762. P. acre, II. R. K. (C. by Dr. Wright.) 

 Marshes and shores ; frequent. Aug. -Oct. 



Specimens on the Inlet Marshes, often with slenderer leaves than 



in the typo. 



763. P. hydropiperoides, Michx. Watkr-pkpper. (H. and C.J 

 Marshes and muddy banks ; infrequent. Aug. -Oct. 



Marshes near head of the lake, (by Cayuga St.) Along Fall Cr. be- 

 tween Forest Home and Etna. Summit Marsh. Our specimens 

 have the "oblong" leaves so far as noticed. 



764. P. amphibium, L. (the typical form of Gray's Man.,) 



(H. and C.) 

 Aquatic ; not common. July-Sept. 



Dryden L. Marl Ponds. Summit Marsh. Danby, in Jenning's 

 Pond. Cayuga and Montezuma Marshes. 



765. P. Muhlenbergii, Watson. (Proc. of Amer. Acad., XIV, p. 295, 

 1879.) (C. by Dr. Wright.) 



Gravelly banks and shores ; frequent. Sept. -Oct. 



By the old R. R. track near the light-house and shore at the head 

 of Cayuga L., where it was first noticed by Dr. Gray, in 1831. Led- 

 yard, 1S27, [Herb. J. J. Thomas.) Near Ludlowville Sta. and north 

 to Lake Ridge PL, where it is abundant. Union Springs. Canoga. 

 Summit Marsh. 



"A perennial in muddy or dry places often 2°-3° feet high. Scab- 

 rous with short appressed or glandular hairs especially upon the 

 leaves and upper stem. Leaves thin, rather broadly lanceolate or 

 cordate at the base, 4 / -7 / long, on short stout petioles ()4 / -i / long) 

 from near the base of the naked sheath. Flowers and fruit nearly 

 as in P. amphibium, L. but spikes more elongated {i / -S / ) often in 

 pairs." 



"New Eng. — Texas and westward. It includes most of the P 

 amphibium, var. terrestre of American botanists, and is the P. am- 

 phibium, L., var. (?) Muhlenbergii, Meisn. in DC. Prod. 14. p. 116." 

 (See Watson, I. c.) 



766. P. Hartwrightii, Gray. (Proc. 0/ Amer. Acad. VIII, p. 294. 1870.) 



(C. by Dr. Wright.) 

 Sphagnum swamps and sedgy marshes ; frequent. Aug. -Sept. 

 Round Marshes. Near pond S. E. of Chicago Sta. Locke Pond. 

 Summit Marsh. Newton's Pond, W. Junius. " Penn Yan," (Dr. 

 S. Hart Wright, who called Dr. Gray's attention to the species.) 



" Strigose-hirsute or smoothish, stem less than a foot high, erect, 

 striate, equally leafy even to the top; leaves broadly lanceolate, acute 

 or obtusish at each end, short-petioled. Ochrae leaf-like to the 

 middle, hypocrateriform, limb foliacious, reticulate, repand, setose- 

 ciliate. Peduncle erect not glandulose, bearing mostly a solitary, 

 dense, cylindrical spike ; bracts surpassing the pedicels ; periogoni- 

 um rose-colored without glands. Stamens 5. Style deeply 2-cleft. 

 Sedgy bogs, N. Y. to Michigan and Wyoming." (Gray, I.e.) Dr. 

 Wright thinks its affinities are with P. amphibium, L. instead of P. 

 Careyi, Olncy. 



