Explanations of Plates 36 to 58, Genus Atriplex. 



Plate 41 — continued. 



(9) Vertical section of the seed showing the 

 superior position of the radicle, X 16. 



(10) Staminate flower, X 16. 



(11) Branch with leaves from the type of a minor 



variation, X 1. (A. greenei, from Rock 

 Springs, Wyoming, 78605 R. For a com- 

 parison between the bracts of this form and 

 t>'pical tenuissima see fig. 34, p. 274.) 

 Atrij^ex pusilta. (Drawn from fresh material from 

 Wells, Nevada.) 



(12) Entire plant of slightly less than the average 



size, X 1. 



(13) Staminate flower, X 16. 



(14) Vertical section of the seed showing the superior 



position of the radicle, X 16. 



(15) Fruiting bract, X 2. As far as known the 



bracts are always of this shape and devoid 

 of dentations and appendages. 

 Atripkx parishi. 



(16) Branch with mostly opposite but a few alter- 



nate leaves, X 1- (Material from Orange 

 County, California, 111236 UC.) 



(17) Two bracts from the same plant as 16, X 2. 



(18) Branch with alternate leaves, X 1. (Drawn 



from fresh material from Chowchilla, Cali- 

 fornia.) 



(19) Three fruiting bracts from the same plant, X 2. 



(20) Vertical section of the seed showing the superior 



position of the radicle, X 16. (Drawn from 

 one of the bracts shown m 19.) 



(21) Staminate flower from the same plant, X 16. 



(22) Two bracts of a single pair, X 16. (Drawn 



from the type of minor variation 1, A. 

 depressa.) 



(23) Habit sketch of a plant growing in heavy, 



alkaline, cracked clay soil in Glenn County, 

 California. 

 Plate 42. 

 Atriplex graciliflora. (Drawn from fresh material 

 from Book Cliffs, eastern Utah, 205346 UC, 

 except fig. 4.) 



(1) One of the ascending branches, terminated 



by a staminate inflorescence; X 1- 



(2) Twig showing more clearly the fruiting bracts, 



these distinguished from the leaves by the 

 heavier shading in the center; X 1. 



(3) A series of three immature bracts showing a 



gradation towards the truncata type of 

 bract, X 2. 



(4) A series of three bracts with the characteristic 



suborbicular outline, X 1. ' (Material from 

 Price, Utah, Hb. Jones.) 



(5) Vertical section of the seed showing the 



superior position of the radicle, X 16. 



(6) Staminate flower, X 16. 



Alrijdex rvolfi. (Drawn from fresh material from 

 Grand Junction, Colorado, the bracts and 

 seed from the type specimen.) 



(7) Branch showing the numerous twigs and the 



leaves, X 1. 



(8) Vertical section of the seed showing the superior 



position of the radicle, X 16. 



(9) Two fruiting bracts, X 2. 



Atriplex truncata. (Drawn from fresh material from 

 Longmont, Colorado.) 



(10) Entire plant of a moderately strict form, X 1. 



(11) Vertical section of the seed showing the superior 



position of the radicle, X 16. 



(12) Two fruiting bracts, X 2. 



Plate 43. 



Atriplex saccaria. 



(1) Branch showing leaves, appendaged bracts, 



and staminate inflorescence; X 1. (Drawn 

 from fresh material from Green River, Utah.) 



(2) Twig with nearly flat leaves, X 1. (Material 



from Marysvale, ITtah, 159008 UC.) 



(3) Portion of branch with only moderately appen- 



daged bracts, X 2. (Material from Chal- 

 cedony Park, Arizona, 205283 UC.) 



(4) Fruiting bract from the same collection as 



fig. 3; most bracts on some plants are of this 

 form, suggestive of A. truncata; X 2. 



(5) Fruiting bract from same plant as fig. 1, X 2. 



(6) Staminate flower from the same, X 16. 



(7) Vertical section of a seed from the same 



showing superior position of radicle, X 16. 

 Atriplex argentea typica. (Drawn from material from 

 Longmont, Colorado, except as indicated.) 



(8) Branch showing the short-petioled upper 



leaves and the fruiting bracts, X 1. 



(9) Vertical section of the seed showing the 



superior position of the radicle, X 16. 



(10) A series of four fruiting bracts, all from the 



same plant showing variation in margins, 

 appendages, and length of stalk; X 2. 



(11) Staminate flower, X 16. 

 Atriplex coronata. 



(12) Branch of a garden plant grown at Berkeley 



California; X 1. 



(13) Portion of twig and leaf of the type specimen 



(Gr), X 1. 



(14) Series of three fruiting bracts, X 2. (Material 



from south of Dos Palos, CaUfomia, 205345 

 UC.) 



(15) Staminate flower from the same plant as fig. 



12, X 16. 



(16) Vertical section of one of the bracts showing 



the superior position of the radicle, X 16. 



(17) Two fruiting bracts with strongly cristate 



appendages, X 2. (From the type of var. 

 notatior, minor variation 1, Hb. Jepson.) 

 Atriplex cordulata. 



(18) A virgate branch showing the closely sessile, 



cordate leaves: X 1. (Drawn from fresh 

 material from Chowchilla, California.) 



(19) A small, unbranched plant; X 1. (Material 



from Volta, Cahfornia, 204515 UC.) 



(20) Staminate flower from the same collection as 



fig. 19, X 16. 



(21) Vertical section of a bract from the same col- 



lection showing the superior position of the 

 radicle, X 16. 



(22) Series of three fruiting bracts from the same 



collection, X 2. 



(23) Series of three fruiting bracts from the type 



specimen (Hb. Jepgon), X 2. 

 Plate 44. 

 Atriplex argentea expansa. (All drawings are from a 

 single plant collected in the Livermore Valley, 

 middle western California, except fig. 19.) 



(1) A leafy fruiting branch showing the closely 



sessile upper leaves, X 1. 



(2) Habit of the mature plant growing in a fallow 



field, X 0.1. 



(3) to (8) A series of leaves selected to show the 



range of variation from the lower to the upper 

 on a single plant, X 1. 

 (9) Vertical section of the seed showing the superior 

 position of the radicle, X 16. 



