Thermopsis rhombifolia

Flower Side, Standard and Near Wing Removed

Fairy Hill, 35 km North of Regina on Highway #6

Thermopsis: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
herbs; NOT [shrubs]
plants with rootstocks and elongate stems; NOT [plants tufted or cushion-like]
stems not twining; NOT [stems twining on vegetation]
leaves palmately divided; NOT [leaves pinnately divided]
leaflets 3 or rarely 1; NOT [leaflets more than 3]
leaflets entire; NOT [leaflets finely toothed]
the terminal leaflet normal; NOT [the terminal leaflet replaced by a tendril]
leaves not glandular-dotted
flowers in spikes or racemes; NOT [flowers solitary in the leaf axils]
flowers all alike; NOT [upper flowers with petals, the lower ones apetalous]
flowers 10-20 mm long; NOT [flowers about 4 mm long]
flowers yellow
keel not truncate; NOT [keel mostly truncate]
pods 4-7 cm long; NOT [pods 2-4 cm long]
pods sickle-shaped; NOT [pods straight]
pods not segmented; NOT [pods usually with 3-5 one-seeded segments which separate at maturity]


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