Key to Lemphoria species

1a. Fruit elliptic to suborbicular, strongly angustiseptate silicles; ovules 6−14 per ovary; seeds uniseriate.

2a. Plants pubescent; fruit valves smooth; petals 1−1.5 mm long; at least some leaves pinnatifid .................................... L. andraeana

2b. Plants glabrous to subglabrous; fruit valves conspicuously reticulate; petals 2−3 mm long; all leaves usually entire ....................... ........................................................................................................................................................................................ L. humistrata

1b. Fruit oblong or linear, subterete or slightly angustiseptate siliques; ovules 20−70 per ovary; seeds biseriate.

3a. Fruit oblong to ellipsoid, 2−2.5 mm wide; ovules 20−40 per ovary; cauline leaves broadly spatulate to obovate, 3−5-lobed........... .................................................................................................................................................................................. L. queenslandica

3b. Fruit linear, 0.6−1.4 mm wide; ovules 50−70 per ovary; cauline leaves narrowly oblanceolate, (3−)5−15-lobed.

4a. Plants pilose throughout; petals 2.5–4 × 0.9–2 mm ........................................................................................................ L. eremigena

4b. Plants glabrous; petals 1.4–2.2 × 0.4–0.7 mm .............................................................................................................. L. procumbens