|
Canada milk-vetch, Canadian milk-vetch, pasture milkvetch, short tooth milk vetch, short-tooth Canadian milkvetch
|
Canada milk-vetch, Canadian milk-vetch
|
|
Plants usually robust, rarely quite slender, (10–)15–120(–160) cm, strigose; from oblique or horizontal rhizomes. |
branched, slender, sometimes decumbent and ascending, (10–)15–55(–75) cm. |
usually erect, sometimes decumbent and ascending, green or purplish, fistulose when stout, 1–7+ cm underground, strigose. |
5–15(–23) cm; leaflets (7–)15–23(or 25), blades (5–)7–30(–40) mm, apex usually apiculate. |
(3–)5–25(–35) cm; stipules 3–18 mm, membranous early becoming scarious; leaflets (7–)13–35, blades lanceolate, lanceolate-oblong, or elliptic, (5–)6–45(–52) mm, apex obtuse, apiculate, or truncate-emarginate, surfaces strigose, sometimes glabrous adaxially. |
(2.5–)4–9.5(–15) × 2.5–3.5 cm, flowers (11.7–)12.5–17(–17.5) mm. |
20–100+-flowered, flowers spreading-declined; axis 2.5–16 cm in fruit; bracts 1.5–10 mm; bracteoles 0–2. |
stout, (4–)5–15(–20) cm, longer or shorter than leaves. |
erect or incurved-ascending, (2.5–)4–22 cm. |
1.2–3.5(–4) mm. |
1.2–3.5(–4) mm. |
calyx (6.8–)7.1–10.5(–11) mm, lobes 1–2.5(–3) mm, adaxial pair nearly always broadly triangular or deltate (and mostly shorter) than the rest; corolla ochroleucous, stramineous, or greenish white. |
11.3–17(–17.5) mm; calyx short-cylindric, (4.6–)5.5–10.5(–11) mm, strigose or pilosulous, tube 4–8.5 mm, lobes subulate or triangular, 1.2–4.4(–5) mm; corolla ochroleucous, greenish white, or stramineous; keel (9.5–)10.2–13.6 mm. |
grooved dorsally, (9–)10–15 × 2.9–4(–4.5) mm, beak 1.5–3 mm, mostly at least moderately strigulose; septum 1.5–3 mm wide. |
brown then blackish, straight or incurved, cylindroid, terete, (9–)10–20 × 2.9–5.2 mm, somewhat fleshy becoming stiffly papery or leathery, usually strigose, strigulose, glabrate, or glabrous, rarely puberulent; sessile or subsessile. |
(17 or)18–25(–28). |
(16–)18–26(–28). |
(3–)4–14 mm, proximalmost ruptured in some very robust specimens. |
|
= 16. |
|
|
|
|
|
| Flowering Jun–Sep. |
|
| Moist but often summer-dry bottomlands, ditches, creek banks with willows, lakeshores, sagebrush hillsides, near springs and seeps, alkaline meadows, depressions on rolling plains, rarely on dry sandy or gravelly soils of brushy hills or lava flows, on stiff, often alkaline, alluvial soils of diverse origin, with sagebrush but ascending along water courses into xeric pine forests. |
|
| 400–2500 m. (1300–8200 ft.) |
|
|
CA; CO; ID; MT; NV; OR; UT; WA; WY; BC |
North America
|
Variety brevidens is the more xeric form of Astragalus canadensis. It is partly sympatric with var. mortonii, but var. mortonii is usually of higher, more mesic, wooded habitats. No single feature distinguishes vars. brevidens and mortonii. In Utah, var. brevidens intergrades with var. canadensis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 3 (3 in the flora). The chromosome number of 2n = 16 is in harmony with the view that the alliance of Astragalus canadensis, along with its near relative A. oreganus, is with the Asiatic A. uliginosus Linnaeus. The relationship is sufficiently close that R. C. Barneby (1964) said of the Canada milkvetch, the New World’s most widely dispersed Astragalus, that taxonomy would most closely reflect biological realities if the New World forms were reduced to varietal status under a bicentrically dispersed A. uliginosus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
1. Legumes not grooved dorsally, usually glabrous, rarely puberulent or strigulose; distribution primarily eastern, extending westward to New Mexico, Utah, Idaho, British Columbia, and Northwest Territories. | var. canadensis |
1. Legumes grooved dorsally, strigose or glabrate; distribution largely intermontane, extending eastward to Black Hills of South Dakota. | → 2 |
2. Stems (25–)30–70(–90) cm; calyx lobes (1.5–)2–4.4 mm, adaxial pair usually not much broader (though sometimes shorter) than the rest; legume beaks (3–)3.5–5 mm; forest belt of n Rocky Mountains (British Columbia southward to Oregon, eastward to Montana). | var. mortonii |
2. Stems (10–)15–55(–75) cm; calyx lobes 1–2.5(–3) mm, adaxial pair nearly always broadly triangular or deltate (and mostly shorter) than the rest; legume beaks 1.5–3 mm; sagebrush valleys, less commonly in meadows, and xeric pine forests (British Columbia southward to California, eastward to Colorado and Montana). | var. brevidens |
|
| FNA vol. 11. |
FNA vol. 11. |
| Fabaceae > subfam. Faboideae > Astragalus > sect. Uliginosi > Astragalus canadensis |
Fabaceae > subfam. Faboideae > Astragalus > sect. Uliginosi |
|
A. accidens, A. accumbens, A. ackermanii, A. acutirostris, A. adanus, A. aequalis, A. agnicidus, A. agrestis, A. albens, A. albulus, A. allochrous, A. alpinus, A. altus, A. alvordensis, A. amblytropis, A. americanus, A. amnis-amissi, A. amphioxys, A. ampullarioides, A. ampullarius, A. andersonii, A. anisus, A. anserinus, A. applegatei, A. aquilonius, A. aretioides, A. argophyllus, A. aridus, A. arizonicus, A. arrectus, A. arthurii, A. asclepiadoides, A. asotinensis, A. asymmetricus, A. atratus, A. atropubescens, A. atwoodii, A. austiniae, A. australis, A. barnebyi, A. barrii, A. beathii, A. beatleyae, A. beckwithii, A. bernardinus, A. bibullatus, A. bicristatus, A. bisulcatus, A. bodinii, A. bolanderi, A. bourgovii, A. brandegeei, A. brauntonii, A. brazoensis, A. breweri, A. californicus, A. callithrix, A. calycosus, A. camptopus, A. caricinus, A. casei, A. castaneiformis, A. castetteri, A. ceramicus, A. cerussatus, A. chamaeleuce, A. chamaemeniscus, A. chinensis, A. chloödes, A. chuskanus, A. cibarius, A. cicer, A. cimae, A. claranus, A. clevelandii, A. cliffordii, A. cobrensis, A. coccineus, A. collinus, A. coltonii, A. columbianus, A. concordius, A. congdonii, A. conjunctus, A. consobrinus, A. contortuplicatus, A. convallarius, A. cottamii, A. crassicarpus, A. cremnophylax, A. cronquistii, A. crotalariae, A. curtipes, A. curvicarpus, A. cusickii, A. cutleri, A. cyaneus, A. cymboides, A. deanei, A. debequaeus, A. desereticus, A. desperatus, A. deterior, A. detritalis, A. diaphanus, A. didymocarpus, A. distortus, A. diversifolius, A. douglasii, A. drabelliformis, A. drummondii, A. duchesnensis, A. eastwoodiae, A. egglestonii, A. emoryanus, A. endopterus, A. ensiformis, A. episcopus, A. equisolensis, A. eremiticus, A. ertterae, A. eucosmus, A. eurekensis, A. eurylobus, A. falcatus, A. feensis, A. filipes, A. flavus, A. flexuosus, A. fucatus, A. funereus, A. gambelianus, A. geyeri, A. gibbsii, A. giganteus, A. gilensis, A. gilmanii, A. gilviflorus, A. glycyphyllos, A. gracilis, A. grayi, A. gypsodes, A. hallii, A. hamiltonii, A. harrisonii, A. heilii, A. henrimontanensis, A. holmgreniorum, A. hoodianus, A. hornii, A. howellii, A. humillimus, A. humistratus, A. hyalinus, A. hypoxylus, A. inflexus, A. insularis, A. inversus, A. inyoensis, A. iodanthus, A. iodopetalus, A. iselyi, A. jaegerianus, A. jejunus, A. johannis-howellii, A. kelseyae, A. kentrophyta, A. kerrii, A. knightii, A. laccoliticus, A. lancearius, A. laxmannii, A. layneae, A. leibergii, A. lemmonii, A. lentiformis, A. lentiginosus, A. leptaleus, A. leptocarpus, A. leucolobus, A. limnocharis, A. lindheimeri, A. linifolius, A. loanus, A. lonchocarpus, A. lotiflorus, A. lutosus, A. lyallii, A. macrodon, A. magdalenae, A. malacoides, A. malacus, A. megacarpus, A. michauxii, A. microcymbus, A. microcystis, A. microlobium, A. micromerius, A. miguelensis, A. minthorniae, A. misellus, A. miser, A. missouriensis, A. moencoppensis, A. mohavensis, A. mollissimus, A. molybdenus, A. monoensis, A. montii, A. monumentalis, A. mulfordiae, A. multiflorus, A. musiniensis, A. naturitensis, A. neglectus, A. nelsonianus, A. neomexicanus, A. nevinii, A. newberryi, A. nidularius, A. nothoxys, A. nudisiliquus, A. nutans, A. nutriosensis, A. nuttallianus, A. nuttallii, A. nutzotinensis, A. nyensis, A. obcordatus, A. obscurus, A. oniciformis, A. oocalycis, A. oocarpus, A. oophorus, A. oreganus, A. osterhoutii, A. oxyphysus, A. pachypus, A. palmeri, A. panamintensis, A. pardalinus, A. parryi, A. pattersonii, A. pauperculus, A. paysonii, A. peckii, A. pectinatus, A. perianus, A. phoenix, A. pictiformis, A. pinonis, A. piscator, A. piutensis, A. plattensis, A. platytropis, A. polaris, A. pomonensis, A. porrectus, A. praelongus, A. preussii, A. proimanthus, A. proximus, A. pseudiodanthus, A. pterocarpus, A. pubentissimus, A. pulsiferae, A. puniceus, A. purshii, A. pycnostachyus, A. racemosus, A. rafaelensis, A. rattanii, A. ravenii, A. recurvus, A. reflexus, A. remotus, A. reventiformis, A. reventus, A. riparius, A. ripleyi, A. robbinsii, A. rusbyi, A. sabulonum, A. sabulosus, A. salmonis, A. saurinus, A. scaphoides, A. schmolliae, A. sclerocarpus, A. scopulorum, A. sepultipes, A. serenoi, A. sericoleucus, A. serpens, A. sesquiflorus, A. sheldonii, A. shevockii, A. shortianus, A. siliceus, A. simplicifolius, A. sinuatus, A. solitarius, A. sophoroides, A. soxmaniorum, A. spaldingii, A. sparsiflorus, A. spatulatus, A. speirocarpus, A. straturensis, A. striatiflorus, A. subcinereus, A. subvestitus, A. succumbens, A. tegetarioides, A. tener, A. tennesseensis, A. tephrodes, A. terminalis, A. tetrapterus, A. thurberi, A. tibetanus, A. tidestromii, A. tiehmii, A. titanophilus, A. toanus, A. toquimanus, A. tortipes, A. traskiae, A. tricarinatus, A. trichopodus, A. tridactylicus, A. troglodytus, A. tweedyi, A. tyghensis, A. umbellatus, A. umbraticus, A. uncialis, A. utahensis, A. vaccarum, A. vallaris, A. vexilliflexus, A. villosus, A. wardii, A. waterfallii, A. webberi, A. welshii, A. wetherillii, A. whitneyi, A. williamsii, A. wingatanus, A. wittmannii, A. woodruffii, A. wootonii, A. wrightii, A. xiphoides, A. yoderwilliamsii, A. zionis |
|
|
| A. mortonii, A. brevidens |
|
| (Gandoger) Barneby: Leafl. W. Bot. 4: 238. (1946) |
Linnaeus: Sp. Pl. 2: 757. (1753) |
| |
BC, 
CA, 
OR, 
WA
Flora NW, 
PNW Herbaria
WildflowerSearch
iNaturalist (observations)
USDA Plants Database
