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 distribution: Humid Transition. 



3. Selaginella densa Rydberg, Mem. N. Y. Bot. Gard. 1 : 7. 1900. 

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



Range: Washington to Montana and Nebrasiia. 

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

 Zonal distribution: Arid Transition. 



4. Selaginella rupestris (L.) Spring; Mart. Fl. Bras. 1-: 118. 1840. 

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



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



Range: British Columbia to New England, south to California and Georgia. 



Specimens examined: Lillewaup, Piper, September, 1890; Klickitat County, Suksdorf 

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



Zonal distribution : 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: 



Selaginella haydeni Hieronymus, Hedwigia 39: 296. 1904. 



Selaginella wallacei Hieronymus, op. cit. 305. 



Selaginella sartorii oregonensis Hieron^nnus, op. cit. 305. 



The type of the last is one of the Lyall specimens above cited. 



ISOETACEAE. 



ISOETES. QUILLAVORT. 



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

 Stems 3-lobed ; leaves setaceous. 



Velum incomplete; megaspores spinulose 1. /. minima. 



Velum complete; megaspores warty 2. 7. nuttallii. 



Stems 2-lobed ; leaves not setaceous 3. 7. howellii. 



Plants aquatic, often in deep water; stems bilobed. 

 Stomata absent. 



Megaspores marked with irregular ridges 4. 7. paupercula. 



Megaspores with low distinct warts 5. 7. piperi. 



Stomata present. 



Leaves erect ; megaspores tuberculate 7.7. holanderi. 



Leaves recurved. 



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



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



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 nuttaUii A. Br.; Engelm. Am. Nat. 8: 215. 1874. 

 Isoetes suksdorfii Baker, Handbook Fern Allies 132. 1887. 

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

 Specimens examined: West Klickitat County, Suksdorf 9\7. 



3. Isoetes howellii Flngelm. Trans. St. Louis Acad. 4: 3S5. 1SS2. 

 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. 



