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Birthwort Family: aristolochiaceae. Aristolochia rcticulata; 6, 16, 17.
Dutchman's Pipe (Aristolochia spp.); 7, 8, 9, 10.
Buckwheat Family: polygonaceae; abundantly represented, especially by the following: Eriogonum, increasingly important westward, 6, 7, 8, 9, 10, 11, 12. Runiex, in low grounds all regions. Polygonum (including Persicaria), low grounds along streams, all re-
gions.
Brunnichia, a high climbing vine in regions 1, 2, 16, 17.
Goosefoot Family: chenopodiaceae; represented on the coast and in saline or alkali regions by species of Dondia, Salsola, A triplex, Salicornia, Chenopodium; on the plains and in West Texas (10, 11, 12) by Sarcobatus, Eurotia, Corispernum, Allenrolfea; in 6, 7, 8, 9, 11, 13, 14, 1 5 by Cycloloma, Monolepis, Chenopodium.
Pigtveed Family: amaranthaceae.
Members of this family are largely weeds in cultivated fields, especially in all sandy regions. None except the globe amaranth, Gomphrena, have conspicuous flowers or other distinctive characters which make possible a fruitful popular discussion within the limits herein obtaining. One or more of twelve or fifteen genera represent the family in every region of the state. The globe amaranth mentioned above is very similar to the cultivated bachelor's buttons, except that it grows prostrate on the ground and bears its bright pink heads on short upright branches some
6 to 8 inches tall. It is mostly found along the southern portion of Region 2 and the wet sandy portions of 5.
Four O'Clock Family: alijoniaceae.
Umbrella-worts (Allionia spp.) are common in great variety in all eastern regions and in moist shaded soils of ravines, hillsides and mountains in the west.
Four O'Clocks (Mirabilis spp.) also are not uncommon, especially in moist rich soil along streamways in 7, 8, 9, 10, 12, 13.
Midget Four O'Clock (Boehaavia spp.) are found in all regions.
Nyctaginia capitata, with its beautiful clusters of bright red flowers is found in sandy soils in 4, ?, 6, 7, 9, 10, 11, 12, 13.
Abronia, with showy clusters of pink or white flowers is found along with the preceding.
Wedelia and Acleisanthes are less showy, mostly prostrate forms which occur in regions 4, 7, 9, 13.
Batis Family: batidacease. A single sprawling prostrate shrub with thick yellowish green succulent leaves, occurs along the immediate coast (2, 4) and is the sole representative of this family.
Pokeweed Family: phytolaccaceae. The common Pokeweed, Phytolacca, and a dwarf red berried relative, Rivina, represent this family; the former
Benjamin Carroll Tharp
