RHODORA, Vol. 95, No. 882, 155-157, 1993 pp. DISCOVERY OF SUBULARIA AQUATIC A IN L. COLORADO AND THE EXTENSION OF RANGE ITS JoDY Nelson and Harmon K. William E. ii ABSTRACT f A new record for the vascular flora of Colorado reported. Subularia aquatica is L. was found growing on muddy, bottom a subalpine lake in north-central Col- orado during the field season of 1992. This extends previously known range its in the Southern Rocky Mountains by approximately 220 miles (354 km) to the east from the Utah localities and 270-280 miles (435-450 km) southeastward from Wyoming its localities. Key Words: Subularia aquatica Colorado, vascular range extension L., flora, work summer new Field during the of 1992 has added a record to the vascular of Colorado. Treatments by Coulter flora (1885), Rydberg Femald Gleason Harrington (1917), (1950), (1952), (1954), Gleason and Cronquist Mulligan and Calder(1964), (1963), Dom(1988), Weber(1976, and Weber and Wittman 1987, 1990), do (1992), not indicate that Subularia aquatica L. occurs in Col- I orado. I I Subularia aquatica L. a dwarf, aquatic or littoral mustard, is when which submerged in or the flowers are either self-pollinating mous common (Mullig bottoms (Gleason, 1952). The Colorado discovery of aquatica in v 5. (R75W Wilderness Area, Larimer County, Mullig found growing Calder aquatica often in (1964) report that 5. is grass OL The Colorado specimens were species of Limosella examples. as muddv bottom lake mann there. discovery Moun Rocky Southern Widely northern across the distributed 155 .1^^ I Rhodora 156 [Vol.95 Greenland, northern Europe the Urals, then disjunct Iceland, to Kamchatka, and then extending from Alaska to Newfoundland, to southward North America into Cal- furthest distribution in is its Wyoming and and ifomia, Utah, (Mulligan Calder, 1964). The Colorado from Mirror closest collections to the location are New Duchesne Utah and Fork Lake, Co., Lakes, Sublette Co., Dinwoody Creek, Fremont Co., and Yellowstone Lake, Yellow- Wyoming and stone National Park, in (Mulligan Calder, 964). all 1 This discovery of aquatica L, in Colorado extends range its >S'. eastward from Utah by approximately 220 miles (354 km) and Wyoming range southeastward from the localities by approx- its 270-280 (435^50 imately miles km). Voucher specimens are being deposited the University of at Northern Colorado Herbarium Greeley (gree), the University at Moun- of Colorado Herbarium Boulder and Rocky at (colo), the Herbarium Laramie tain at (rm). Dan Moore Special thanks are given to Bach and John for their assistance. LITERATURE CITED Coulter, M. 888. Manual of Botany of Rocky Mountain Region. Ivison, the J. 1 New Blakeman, and Taylor, Co., York, N.Y. 452 pp. DoRN, R. D. 1988. Vascular Plants of Wyoming. Mountain West P Chey Wy. enne, 340 pp. M. FeRNALD. L. 1950. Grav'^i Manual of Rntanv Rth Amf>riran Book f-H New York, N.Y. 1632 pp. Gleason, H. a, 1952. The new and Brown of Britton Flora the Illustrated Lancas Lancaster Press, 655 Pa. ter. pp. AND A. Cronquist. Manual 1963. of Vascular Plants of Northeastern United Stales and Adjacent Canada. D. Van Nostrand New York, Co., Inc., N.Y. 810 pp. Harrington, H. D. 1954. Manual of the Plants of Colorado. Sage Books, Denver: 666 pp. Mulligan, and G. A. A. Calder. 1964. The genus Subularia (Cruciferae). J. Rhodora 127-135. 66: Rydberg, a. Rocky P, 1917. Flora of the Mountains and Adjacent Plains. Steinman and Foltz, Lancaster, Pa. 1110 pp. W. Weber, A. Rocky 1976. mountain Colorado Associated University flora. — Press. Boulder, Co. 479 pp. 1990. Colorado Western Flora: Slope. Colorado Associated University . Press, Boulder, Co, 530 pp. 990. Colorado Flora: Eastern Slope. University Press of Colorado, 1 Niwot, Co. 396 pp. Harmon— Nelson and 157 1993] 5'wZ)M/ar/fl — AND WiTTMANN. R. C. 1992. Catalog of the Colorado Flora: 3 Biodivcrsity Baseline. University Press of Colorado, Niwot, Co. 215 pp. DEPARTMENT OF BIOLOGICAL SCIENCES ROSS 228 NORTHERN COLORADO UNIVERSITY OF t CO GREELEY, 80639 t I r t