8&8 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Rance: 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 Locauity: “Little Rocky Mountains,’ Montana. 
Rance: Washington to Montana and Nebraska. 
SPECIMENS EXAMINED: Wawawai, Piper, May 26, 1894. 
ZONAL DISTRIBUTION: Arid Transition. 
4. Selaginella rupestris (L.) Spring; Mart. Fl. Bras. 12: 118. 1840. 
Lycopodium rupestre L. Sp. Pl. 2: 1101. 1753. 
Type Locaity: ‘Habitat in Virginia, Canada, Siberia.”’ 
Rance: 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 hayden. Hieronymus, Hedwigia 39: 296. 1904. 
Selaginella wallacei Hieronymus, op. cit. 305. 
Selaginella sartorii oregonensis Hieronymus, op. cit. 305. 
The type of the last is one of the Lyall specimens above cited. 
ISOETACEAE. 
ISOETES. Quitiworr. 
Plants of shallow water or muddy places; leaves with stomata. 
Stems 3-lobed; leaves setaceous. 
Velum incomplete; megaspores spinulose............ 1. 1. minima. 
Velum complete; megaspores warty...........--.-- 2. 1. nuttallir. 
Stems 2-lobed; leaves not setaceous .............-2-- ..- 38.1. howellit. 
Plants aquatic, often in deep water; stems bilobed. 
Stomata absent. 
Megaspores marked with irregular ridges... .._..... - 4. I. paupercula. 
Megaspores with low distinct warts...........-.-.-- 5. I. piperi. 
Stomata present. 
Leaves erect; megaspores tuberculate......... 22... - 7. I. bolanderi. 
Leaves recurved. 
Megaspores spinulose; microspores smooth... . . 6a. I. echinospora braunii. 
Megaspores tuberculate; microspores spinulose .. 6b. [.echinospora flettii. 
1. Isoetes minima A. A. Eaton, Fern Bull. 6: 30. 1898. 
TyPE Locatity: Near Waverly, Washington. Collected by Suksdorf, 
SPECIMENS EXAMINED: Waverly, Suksdorf. 
2. Isoetes nuttallii A. Br.; Engelm. Am. Nat. 8: 215. 1874. 
Tsoetes suksdorfii Baker, Handbook Fern Allies 132. 1887. 
Type Locatity: ‘On the Columbia.’ Collected by Nuttall. 
SPECIMENS EXAMINED: West Klickitat County, Suksdorf 917. 
3. Isoetes howellii Engelm. Trans. St. Louis Acad. 4: 385. 1882. 
Tsoetes nuda Engelm. 1. ¢. 
Isoetes underwoodii Henderson, Bot. Gaz. 23: 124. 1897. 
Type Locatity: “On the borders of ponds at The Dalles of the Columbia, Oregon.” Col- 
lected by Howell. 
