New Search
,01/,20/95 10:45 '503 231 6195 PTLD. FIFLD STA. Q003 • <br /> • <br /> yards of.fill material and•replanting with - native plants, :including <br /> bradshawii (I,. ):;radshawii) Four. existing drainage culverts and:catch basins <br /> will be retained.' These, structurea will be diked or raised to retain as . much <br /> water as possible without inoreasing'potential flooding of Amazon foot - <br /> and bike paths. Maintenance of the mitigation site :;will consist'of regular <br /> site inspection; trash clean -up, and rough mowing after lomatium seeds have <br /> matured:-in July or early August. Hxotic species may be controlled..by hand, as. <br /> • resources permit. Wetland conditions and -plant survival will be : : <br /> aruival ly . <br /> ,SPECIES ACCOUNT , . • . <br /> Species Dtsctiption <br /> L: bradshawii. is a member:of the.Apiaceae (=Umbeliferae,parsley or umbel) <br /> family.(US:FWS,1993).. It is a taprooted, herbaceous plant with compact yellow <br /> flowers. in compound umbels (Hitchcock and.Cronguist 1973,_Kagan .1980)., It is <br /> found`in seasonally ' wet -.prairies;of the'Willamette Valley Marion, Benton, <br /> Linn,, and Lane Counties, More detailed descriptions of L: bradshawii can be • <br /> found•in Hitchcock and Cronquist (1973), Kagan (1980), Meinke (1982), and, . <br /> Bradshaw :'s Lomatium Recovery Plan (USFWS 1993) (Recovery Plan). <br /> • <br /> Habitat <br /> ' L. bradshawii is endemic to the 'central and southern portions of the , <br /> - Willamette Valley in western Oregon ( USFWS 1993). According to the Recovery" <br /> Plan' 1993), it is known-to occur in two distinct habitat. types: (1) ,: <br /> shallow, alluvial soils near the Santiam River; and' (2) seasonally saturated <br /> or flooded prairies along creeks and streams in the southern Willamette <br /> Valley. The latter'habitat is more common and supports more populations than . <br /> the former. In, addition, a large population was recently discovered near <br /> LaCamas Lake, Washington in 1994. <br /> • L. bradshawii occurs in'the wet prairies dominatedby tufted - hairgrass : <br /> ' ` (Deschainpsia caespitosa).- The.Deschampsia community is a tall grass prairie <br /> . type, typically found in the low, flat, bottomlands of the Willamette Valley . <br /> (Franklin and Dyrness 1973). These areas usually have'standing water_ from <br /> October to y May. The•soils are uniformly heav clay with little rock,. sand; or <br /> gravel present (Kagan ..1980). <br /> Native vascular.plants associated. with this habitat type are listed in . <br /> ' Appendix 1. Numerous introduced plants are also common in the'wet prairie <br /> • The most common'introduced species foundat Willow .Creek Preserve, a <br /> Deschainpsia "caespitosa grassland; are also in Appendix 1.. The wetter. <br /> depressions often'support Hordeum brachyantherum (mea barley), Beckmanrnia <br /> syzigachne, sloughgrass), Alopecurus geniculatus (water foxtail),• <br /> Camassia quainash (common camas), Montia linearis ( narrow - leaved montia) - ; and <br /> Eleocharis acicularis (needle spike -rush) (Franklin and Dyrness 1973). . <br /> - More detailed information regarding the habitat.of L. bradshawii.can be found. <br /> • in Kagan (1980), and - the Recovery Plan ( USFWS 1993). <br /> Life History .• ... <br /> Peak.blooming'period occurs the last week •in April through "the first week in <br /> May.. It'is•easily distinguished because it is the` only yellow flower blooming <br />