PROVISIONAL

NWPL (2016 update) species info from the eHALOPH databse

Species

Fig. 1 Count of species by region and NWPL rating

Count of species with “known or presumed tolerance to electrical conductivity measuring of at least 7.8 dS m-1, during significant periods of the plant’s entire life” on the NWPL (2016 update) by NWPL rating and Corps region. Halophyte designation from the eHALOPH database

Fig. 2 Count of species by lifeform, region and NWPL rating

Count of species with “known or presumed tolerance to electrical conductivity measuring of at least 7.8 dS m-1, during significant periods of the plant’s entire life” on the NWPL (2016 update) comparing NWPL rating and life form within Corps regions. Halophyte and life form designations are from the eHALOPH database

Fig. 3 Count of species by plant type, region and NWPL rating

Count of halophytic species (i.e., with “known or presumed tolerance to electrical conductivity measuring of at least 7.8 dS m-1, during significant periods of the plant’s entire life”) on the 2016 NWPL by rating, plant type, and Corps region. Halophyte and plant type designations are from the eHALOPH database

Fig. 4 Breakdown of species by family

Tables of species by Corps region

Notes:

Northcentral and Northeast (NCNE)

Midwest (MW)

Eastern Mountains and Piedmont (EMP)

Great Plains (GP)

Arid West (AW)

Atlantic and Gulf Coastal Plain (AGCP)

Western Mountains, Valleys & Coast (WMVC)

Alaska (AK)

Hawaii (HI)

Caribbean (CB)

Plant Life-Form:

The “plant type” categories in the tables above describe are based on the system developed Raunkiaer (1934) and modified by Govaerts et al. (2000). Plants are classified according to the positions of their perennating buds. The summary below was developed by the Kew Royal Botanical Gardens (http://data.kew.org/sid/plantform.html).

Phanerophytes (phan.) have stems that are woody and persistent, and buds that are normally exposed 3 m or more above ground level. This category includes trees and large shrubs

Nanophanerophytes (nanophan.) also have woody, persistent stems, but are lower in stature with buds typically located between 0.5 m and 3 m above ground level. This category includes smaller shrubs.

Herbaceous phanerophytes (herb. phan.) have herbaceous stems that persist for several years and include tropical species such as bananas and plantains.

Chamaephytes (cham.) can have stems that are herbaceous or woody and persistent, and have buds that are located above soil level, but never by more than 50 cm. This group includes dwarf shrubs and some perennial herbs.

Hemicryptophytes (hemicr.) have herbaceous stems that often die-back during unfavourable seasons, and surviving buds placed on (or just below) soil level. This group includes many biennial and perennial herbs, including those in which buds grow from a basal rosette.

Geophytes (not abbreviated) have stems that die back during unfavourable seasons, with the plant surviving as a bulb, rhizome, tuber or root bud.

Therophytes (ther.) complete their entire life-cycle during the favourable season, and survive the unfavourable season as a seed. This group includes all annual herbs.

Epiphytes (epi.) grow on other plants (their growing buds occur on another plant).

Helophytes (hel.) are plants in which surviving buds are buried in water-saturated soil, or below water-level, but that have flowers and leaves that are fully emergent during the growing season. The group includes many marsh and emergent aquatic herbs.

Hydrophytes (hydro.) are fully aquatic herbs in which surviving buds are submerged, or buried in soil beneath water. Their stems and vegetative shoots grow entirely underwater and leaves can be submerged or floating, but only the flower-bearing parts may be emergent.

References

Lichvar, R. W., D. L. Banks, W. N. Kirchner, and N. C. Melvin. 2016. The National Wetland Plant List: 2016 wetland ratings. Phytoneuron 30:1-17.

Santos, J. et al. (2016) eHALOPH -a database of salt-tolerant plants: helping put halophytes to work. Plant Cell Physiol 57 (1), e10-e10.