| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Hydrophyllaceae | Phacelia austrotexana | South Texas Scorpionweed | |||
| Hydrophyllaceae | Phacelia bipinnatifida | Fernleaf Phacelia, Forest Phacelia, Purple Phacelia | Cove forests, especially where rocky; also popular as a native plant for horticultural use, and sometimes found as a persistent or spreading from horticultural use. | W. VA west to s. OH, n. IN, n. IL, and c. MO, south to w. NC, nw. SC, n. GA, c. AL, and n. AR. |  |
| Hydrophyllaceae | Phacelia congesta | Spike Phacelia | Dry sandy or rocky areas; eastward as a waif in disturbed areas. | Se. and sc. OK south to e. TX, s. TX, s. NM, and Mexico. |  |
| Hydrophyllaceae | Phacelia covillei | Eastern Buttercup Phacelia | Rich soils of floodplains, and contiguous terraces and slopes. | Ranging in three disjunct areas: c. NC and sc. VA (in the drainages of the Cape Fear, Tar, and Roanoke rivers); DC, n. VA, and sc. MD (in the drainage of the Potomac River); and disjunct at scattered locations w. WV, s. OH, sw. IN, and s. MO (in the drainage of the Ohio River and its tributaries, except the MO occurrence) (Sewell & Vincent 2006) |  |
| Hydrophyllaceae | Phacelia dubia var. dubia | Appalachian Phacelia | Floodplain forests, other moist and rich forests, rocky forests, fields, roadsides, granitic flatrocks. | Var. dubia ranges from NY and PA west to WV, south to nc. SC, sw. NC, and se. TN, with scattered occurrences (perhaps adventive) further south, to FL Panhandle (L. Anderson, pers.comm., 2022). |  |
| Hydrophyllaceae | Phacelia dubia var. georgiana | Georgia Phacelia | Granitic flatrocks. | Var. georgiana ranges from GA west to ec. AL, in the Piedmont |  |
| Hydrophyllaceae | Phacelia dubia var. interior | Central Basin Phacelia | Limestone glades, dry fields over limestone. | Endemic in c. TN. | |
| Hydrophyllaceae | Phacelia dubia var. rionensis | South Carolina Phacelia | Granitic flatrocks and domes. | Nc. and sc. SC. | |
| Hydrophyllaceae | Phacelia fimbriata | Fringed Phacelia, Blue Ridge Phacelia | Moist forests on slopes and floodplains, at low to high elevations, perhaps mainly over circumneutral soils, often locally abundant. | Sw. VA south to w. NC, and e. TN, a Southern Appalachian endemic. Reports from n. GA (Jones & Coile 1988) are erroneous, based on misidentified P. purshii. |  |
| Hydrophyllaceae | Phacelia gilioides | Ozark Phacelia, Brand's Scorpionweed | Glades, barrens and woodlands over calcareous rocks, bottomlands, disturbed areas. | Mainly Ozarkian, with a few records east of the Mississippi River. |  |
| Hydrophyllaceae | Phacelia glabra | Smooth Scorpion-weed | Prairies, forests. | AR and OK south to n. LA and e. TX. |  |
| Hydrophyllaceae | Phacelia hirsuta | Ozark Phacelia | Sandy prairies and woodlands; eastwards in disturbed areas. | MO and se. KS south to s. LA and e. TX. |  |
| Hydrophyllaceae | Phacelia laxa | Coastal Scorpionweed | River bottomlands and other shaded, moist areas. | Endemic to s. TX. | |
| Hydrophyllaceae | Phacelia maculata | Flatrock Phacelia | Bottomlands, granitic flatrocks. | Sc. NC south to GA and west to ec. AL. |  |
| Hydrophyllaceae | Phacelia patuliflora var. patuliflora | Alluvial areas and sandy soils. | C. and se. TX. | ||
| Hydrophyllaceae | Phacelia patuliflora var. teucriifolia | Alluvial areas. | Nc. and c. TX. | ||
| Hydrophyllaceae | Phacelia purshii var. boykinii | Miami-mist | Moist forests on floodplains and slopes, glades and glade margins. | W. and sc. VA, KY, and s. IN south to wc. GA, AL, and ne. MS. |  |
| Hydrophyllaceae | Phacelia purshii var. purshii | Miami-mist | Moist forests on floodplains and slopes. | S. PA west to s. ON, OH, MO, and nw. AR, south to w. VA and c. TN. |  |
| Hydrophyllaceae | Phacelia ranunculacea | Western Buttercup Phacelia | Bottomland forests. | In the Mississippi and Ohio river drainages, centered around St. Louis, MO (w. KY, w. TN, e. MO, ne. AR, se. MO, s. IL, and s. IN). Reported for sc. AL, apparently in error. |  |
| Hydrophyllaceae | Phacelia robusta | Stout Scorpion-weed | On gravelly or clay soils. | Sc. KS south through OK to c. and w. TX and Mexico (CHH, COA, DGO, NLE). | |
| Hydrophyllaceae | Phacelia strictiflora var. connexa | Dry areas. | OK south to e. TX. | ||
| Hydrophyllaceae | Phacelia strictiflora var. lundelliana | Dry sites. | OK south to nc. TX. | ||
| Hydrophyllaceae | Phacelia strictiflora var. robbinsii | Prairie Scorpion-weed | Dry sandy open areas and woodlands. | W. AR and OK south to w. LA and ne. TX; disjunct eastwards in the Black Belt of e. MS and AL. | |
| Hydrophyllaceae | Phacelia strictiflora var. strictiflora | Open sands and sandy woodlands. | E. TX, mainly on the Carrizo Sands. |
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