2(1). Flowers in head with stamens all alike, anther-bearing; flower heads (when 

 in bud) with 30 to 60 flowers, subcylindric; stipe of pod 4-15 mm. 

 long; leaflets 8 to 18 pairs; calyx 1-2 mm. long (including lobes) 

 1. N. lutea. 



2. Flowers in upper part of head with anther-bearing stamens, those in lower 

 part smaller and with yellow (drying orange) petaloid staminodes; 

 flower heads (in bud) with 20 to 30 flowers, ovoid; stipe of pod 

 0-4 mm. long (rarely 5 mm.); leaflets 14 to 43 pairs; calyx 2-2.7 

 mm. long (including lobes) 2. N. pubescens. 



1. Neptunia lutea (Leavenw.) Benth. Yellow-puff. 



Pinnae 2 to 11 pairs; petioles and rachises glandless; leaflets 8 to 18 pairs per 

 pinna, with raised reticulate venation beneath; floral cup (plus sepals) 1-2 mm. 

 long; flowering peduncles with 1 or 2 subulate bracts 1-3 mm. long and 1-2 mm. 

 broad, or these absent; flower heads with 30 to 60 flowers, slightly elongate; stipe 

 of pod (4-) 5-15 mm. long. Incl. var multipinnatifida B. L. Turner. 



Scattered or locally frequent in fields, meadows and wetlands in the e. half of 

 Okla. and over the e. half of Tex. s. to Aransas and Goliad cos., w. to n.-cen. 

 Tex. (one record for Runnels Co.), Apr -Oct.; Ala., Miss., Ark., La., Okla. and 

 Tex. 



2. Neptunia pubescens Benth. '^ 



Pinnae 2 to 5 (or 6) pairs; petioles and rachises glandless; leaflets 14 to 43 

 pairs per pinna, with raised reticulate venation beneath; flower cup (plus sepals) 

 2-2.7 mm. long; flowering peduncles with 1 or 2 subulate bracts 1-3 mm. long 

 and 1-2 mm. broad, or these absent; flower heads with 20 to 30 flowers, essen- 

 tially round or ovoid; stipe of pod 0-4 mm. long (rarely to 5 mm.). 



Frequent in marshes, grasslands and dry sandy places near the coast and inland 

 to Val Verde Co., Tex. Represented with us by 2 varieties as follows: 



Var. pubescens. Stipe of legume longer than the persistent calyx; legume usually 

 tapering to the stipe; leaves with 3 to 6 pairs of pinnae. N. floridana Small, N. 

 Lindheimeri Robins. Coastal Plain of Tex. inland to Anderson, Leon and Gon- 

 zales COS., May-Oct.; Gulf Coastal States; W.L, Mex., C.A., Col., Peru, Parag. and 

 Arg. 



Var. microcarpa (Rose) Windier. Stipe of legume usually shorter than the 

 persistent calyx (shorter than 2 mm.); legume usually rounded to the stipe; leaves 

 usually with 2 to 3 pairs of pinnae. N. Palmeri Britt. & Rose. N. part of Rio 

 Grande Plains from McMuUen and Atascosa cos. w, to Val Verde Co. in Tex., 

 May-July; Tex., Coah., N.L. and Jal. 



3. Neptunia plena (L.) Benth. 



Terrestrial to semiaquatic; stems when in watery environment producing a 

 thick spongy indument; pinnae 2 to 5 pairs; petioles with a gland just below the 

 lowest pair of pinnae; leaflets 9 to 38 pairs per pinna, without raised reticulate 

 veins; flowering peduncles bearing 2 large cordate bracts about 4-8 mm. long 

 and 3-8 mm. broad; flower head ovoid; stipe of pod 3-9 mm. long, longer than the 

 persistent calyx. 



Known from a single collection from a temporary lake just s. of Armstrong, 

 Kenedy Co. in s. Texas, Oct. 17, 1938, probably not a persistent member of our 

 flora; Braz. and Peru, n. to W.L and Mex.; adv. in India. 



3. Gleditsia L. Honey Locust 



A genus of 1 1 species in North America, South America, Asia and Africa. 

 The name is sometimes spelled "Gleditschia." 



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