88 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Range: Near the seacoast, British Columbia to Oregon. 



Specimens examined: Southbend, Piper in 1900; Laban, Piper 3820; Quinault, 

 Conard 174. 



Zonal DisxRiBtmoN : Humid Transition. 



3. Selaginella densa Rvdberg, Mem. N. Y. Bot. Card. 1 : 7. 1900. 

 Type localiti': "Little Rocky Mountains," Montana. 



Range: Washington to Montana and Nebraska. ~ 



Specimens examined: Wawawai, Piper, May 26, 1894. 

 Zonal distribution: Arid Transition. 



4. SelagineUa rupestris (L.) Spring; Mart. Fl. Bras. 1^: 118. 1840. 

 Lycopodium rupestre L. Sp. PI. 2: 1101. 1753. 



Type localiti": "Habitat in Virginia, Canada, Siberia." 



Range: British Columbia to New England, south to California and Geoi-gia. 



Specimens e.xa.mined: Lillewaup, Piper, September, 1890; Klickitat County, Sxtksdorf 

 66; Cascade Mountains, latitude 49°, Lyall 1376; Cape Horn, Piper 4964. 



Zonal distribltion: Humid Transition. 



In a recent paper by Hieronymus a large number of new species allied to Selaginella 

 rupestris are proposed. Three of these are from Washington and Oregon, namely: 



SelagineUa haydeni Hieronjnnus, Hedwigia 39: 296. 1904. 



Selaginella waUacei Hieronymus, op. cit. 30.5. 



Selaginella sariorii oregonensis Hieronymus, op. cit. 305. 



The type of the last is one of the Lyall specimens al)ove cited. 



ISOETACEAE. 



ISOETES. Quillwort. 



Plants of shallow water or muddy places ; leaves with stomata. 

 Stems 3-lobed; leaves setaceous. 



Velum incomplete; megasporcs spinulose 1. /. minima. 



Velum complete ; megasporcs warty 2. /. nuttallii. 



Stems 2-lobed ; leaves not setaceous 3. /. hoTveUii. 



Plants aquatic, often in deep water; stems bilobed. 

 Stomata absent. 



Megasporcs marked with irregular ridges 4. /. paupercvla. 



Megasporcs with low distinct warts 5. /. piperi. 



Stomata present. 



Leaves erect ; megaspores tuberculate 7.1. bolanderi. 



Leaves recurved. 



Megaspores spinulose; microspores smooth 6a. /. echinospora hraunii. 



Megaspores tuberculate ; microspores spinulose . . 6b. I .echinospora fiettii. 



1. Isoetes minima A. A. Eaton, Fern Bull. 6: 30. 1898. ^ 

 Type locality: Near Waverly, Washington. Collected by Suksdorf. 

 Specimens examined: Waverly, Suksdorf. 



2. Isoetes nuttallii A. Br.; Engelm. Am. Nat. 8: 215. 1874. 

 Isoet€S suksdorfii Baker, Handbook Fern Allies 132. 1887. 

 Type locality: "On the Columbia." Collected by Nuttall. 

 Specimens examined: West Klickitat County, Suksdorf 9\1. 



3. Isoetes howellii Engelm. Trans. St. Louis Acad. 4: 38.5. 1882. 

 Isoetes nuda Engelm. 1. c. 



Isoetes underwoodii Henderson, Bot. Gaz. 23: 124. 1897. 



Type locality: "On the borders of ponds at The Dalles of the Columbia, Oregon." Col- 

 lected by Howell. 



