Astragalus tenellus

Loose-Flowered Milk-Vetch

Stamens and Style

Buffalograss Ecological Reserve

Note that all the petals have been removed for the purpose of this photo.  Nine of the ten stamens are united at the lower portions of their filaments forming a stamen bundle.  The tenth stamen is distinct from the rest.


Tenellus: Answers to key questions in Budd's Flora (BF)  and Flora of Alberta (FOA) leading to this species. 
bulletplants taller; NOT [plants low, 10 cm or less]
bulletplants with erect or decumbent stems; NOT [plants low, cushion-like, matted or straggling] (BF)
bulletstems evident, erect or decumbent, often branched and leafy; NOT [plants densely caespitose or pulvinate; leaves many, crowded; flowers often included among leaves or barely exceeding them] (FOA)
bulletplants NOT densely hairy
bulletstems generally less than 5 mm thick at base; NOT [stems generally thick, 5-10 mm at base]
bulletleaves NOT needle-like; NOT [leaves needle-like, about 10 mm long, 1mm wide, distinctly spine-tipped]
bulletleaflets shorter; NOT [leaflets 2-4 (6) cm long]
bulletleaflets not narrowly linear; NOT [leaflets very narrowly linear]
bulletleaflets glabrous or nearly so; NOT [leaflets strigose, at least beneath]
bulletinflorescence loosely flowered; NOT [inflorescence densely flowered]
bulletflowers 10-15 mm long; NOT [flowers about 20 mm long]
bulletflowers white, yellow, or greenish; NOT [flowers at least partly reddish, purplish, or bluish] (BF)
bulletpetals mostly yellow, cream or orange, the keel sometimes tinged with blue or blue-tipped; NOT [petals blue, purple or pink or predominantly so (sometimes very pale with only flashes of deeper colour)] (FOA)
bulletwing-petals entire; NOT [wing-petals deeply bidentate at the apex]
bulletkeel-petals less than 6 mm long; NOT [keel-petals longer than 6 mm ]
bulletkeel-petals much shorter than the wings; NOT [keel-petals about as long as the wings]
bulletpods oblong
bulletpods pointed at both ends



Astragalus: Answers to key questions in Budd's Flora (BF)  and Flora of Alberta (FOA) leading to this genus. 
bulletherbs; NOT [shrubs]
bulletplants NOT climbing
bulletleafy stems often present; NOT [leafy stems usually absent]
bulletthe terminal leaflet normal; NOT [the terminal leaflet replaced by a tendril]
bulletleaflets more than 3; NOT [leaflets 3 (rarely 1)]
bulletleaves pinnate; NOT [leaves palmate]
bulletleaves NOT glandular-dotted
bulletkeel not truncate; NOT [keel mostly truncate]
bulletkeel rounded or obtuse at the tip; NOT [keel with a sharp point at the tip]
bulletpods NOT segmented or jointed; NOT [pods segmented or jointed, breaking up at maturity]
bulletNOT [flowers pinkish to red or purple; calyx-lobes subulate, much longer than the tube; fruit only slightly longer than wide, with short, stout spines, 1-seeded]
bulletNOT [inflorescence umbel-like; flowers yellow; leaflets 5, pinnately arranged (the lower pair basal and resembling stipules)]



Leguminosae: Answers to key questions in Budd's Flora leading to this family.
bulletherbs; NOT [shrubs or trees]
bulletplants terrestrial or semi-aquatic; NOT [plants aquatic, leaves submerged or floating]
bulletplants NOT with colored milky juice
bulletplants with more than one normal leaf
bulletsome or all leaves alternate; NOT [leaves opposite, whorled, or basal]
bulletleaves with stipules; NOT [leaves without stipules, or having glands]
bulletflowers with two floral rings, and with each petal distinct from the others]
bulletcalyx regular; NOT [calyx irregular, some sepals smaller than others]
bulletflowers irregular in shape; NOT [flowers regular in shape]
bulletcorolla pea-like; NOT [corolla with one petal spurred or sac-like]
bulletstamens usually separate or partly so, not in a column; NOT [stamens numerous, united into a column]
bulletfruit a legume; NOT [fruit a 3-valved capsule]