130 Rhodora [June 



which lie treats in both cases as P. pectinatus L. var. — ? Number 

 1007 is a slender "sometimes proliferous" form "whose peduncle is 

 usually over j m. long." Number 1008 is a gigantic form, with plume- 

 like bushy tops, up to 5^ m. in length, frequently proliferous, not 

 found in flower or fruit. These plants have been known for many 

 years, the latter since 1874, and have received intensive study by 

 local observers for a number of years. 



Through the kindness of Miss Emmeline Moore the author has been 

 able to examine specimens corresponding to each of these numbers. 

 Number 1007 is a very much elongated, deep-water state of P. pccti- 

 nains, but not distinct enough to require any special designation. 

 Number 1008 proves to be similarly elongated, sterile P. moniliformis 

 St. John. 



3. P. LATIFOLIU8 (Robbins) Morong, Mem. Torr. Hot. Club, iii. 

 no. 2, 52 (1893). P. pevtinatw I,., var. (?) lutifoliux Robbins, Bot. 

 King's Exp. 338 (1871). — Stem 1-2 mm. thick, whitish, freely branch- 

 ing above: leaves linear, obtuse or shortly apiculate, 2-4 nun. wide, 

 3-5 nerved with strong cross-veins making a rectangular pattern; 

 the upper short, 1.5-2.5 em. long; sheaths swollen, 2-4 times thicker 

 than the stem; ligulc short, obtuse, hyaline: peduncles short, 2-10 

 cm. long: spikes interrupted, 1-3 cm. long: fruit obovate, 3 nun. long, 

 2 nun. wide; style borne near the ventral margin, incurved. Deep 

 waters, still or (lowing, Oregon, south to California and Arizona. 

 Nevada: Humbolt Lake, 4,000 feet altitude, Aug., L867, W. W. 

 Bailey, no. 1,1-12 (H); Hot Springs, Desert, Aug. 1S74, ./. (V. Lemmon, 

 no. 1,204 (H). Arizona: Santa Cruz (reck, Tucson, 1881, ./. (L 

 Lemmon, no. 579 (H). CALIFORNIA: King's River, 1876, -/. 0. 

 Lemmon, no. 1,521 (H); in waters warmed by hot spring above 14 

 mile station, Bridgeport and Sonora Road, Mono County, Aug. 23, 

 1898, ./. W. Congdon, no. 9,915 (H). Oregon: Goose Lake, July 23, 

 1S97, B. W. Evermann (H). 



4. P. moniliformis, n. sp., rhizomate 2-3 nun. crasso; caule 

 Buperne valde ramoso, ramis 2—1 ad nodum, vaginis principalibus 

 inHatis, quam caulcs 2-o-plo crassioribus, 2..V7) cm. longis, 2 -5 mm. 

 latis, laminis brevibus obtusis habenis similibus latis, 1 4.5 cm. longis, 

 1—2 nun. latis, venis transversis nervisque reticulum crassum f orman- 

 tibus, oervis vaginarum prominentibus ad apicem incurvatis ligulam 

 integram brevissimam defugantibus; folds superioribus filiformibus 

 obtusis vel retusis, 5-1 1 cm. longis, 0.2 1 nun. latis cum ligulis longiori- 

 bus; pedunculis brevibus, 3 8 em. longis, spicis interruptis, 1-6 cm. 

 longis, vcrticillis multis (5-12) aequidistantibus vel inferioribus 

 remotis, fructubus oblique obovatia non manifeste carinatis, 3 mm. 

 longis, 2 nun. latis, stigmatibus sessilibus ad margines ventrales 

 proxhnis. 



