A subshrub (Latin suffrutex) is a horticultural rather than strictly botanical category of woodyperennial plant, distinguished from a shrub by variously its ground-hugging stems and lower height, with overwintering perennial woody growth typically less than 10-20 cm tall, or by being only weakly woody and/or only persisting for a few years. Small, low shrubs such as lavender, periwinkle and thyme, and many members of the family Ericaceae such as cranberries, are often classed as subshrubs.
Widespread subshrub; common on rocky slopes in desertscrub and desert grassland; 670 and 1430 m (2200 and 4700 feet); flowers yellow, March and April and July and November.
Scattered subshrub; uncommon to common on rocky slopes and along washes in desertscrub and desert grassland; 945 and 1430 m (3100 and 4700 feet); flowers yellow, (May) September and January.
Widespread subshrub; uncommon on rocky slopes and bajadas, common on disturbed soils and roadsides; 640 and 975 m (2100 and 3200 feet); flowers yellow, (June) August and December.