Explanations of Plates 1 to 23, Genus Artemisia. 



Plate 1. 



Artemisia abrolanum. (Drawn from material collected 

 in Virginia from an introduced plant, 29718 

 UC; supplemented by foliage from a plant 

 in the Botanical Garden of the University 

 of California.) 



(1) Erect shoot showing the narrow leaf-lobes and 



the broad inflorescence, X 1. 



(2) Young head, X 8. 



(3) Outer bract of the involucre, X 16. 



(4) Middle bract, X 16. 



(5) Inner bract, X 16. 



(6) Ray-flower, showing a few glands on the 



corolla, X 16. 



(7) Style-branches of a ray-flower, X 24. 



(8) Disk-flower with a few resin-glands on the 



achene and corolla, X 16. 



(9) Style of the disk-flower showing the truncate 



tips, X 24. 

 Artemisia pontica. (Dra\vn from material collected 

 in Europe, 161793 UC). 



(10) Erect stem showing the finely pinnatifid foliage 



and the elongated inflorescence, X 1. 



(11) Mature head, X 8. 



(12) Outer bract of the involucre, X 16. 



(13) Inner bract, X 16. 



(14) Ray-flower showing the irregularly angled 



achene, X 16. 



(15) Style of the ray-flower, X 24. 



(16) Disk-flower showing the broad-topped, angular 



achene, X 16. 



(17) Style of the disk-flower showing the truncate 



and penicillate branches, X 24. 

 Plate 2. 

 Artemisia californica. (Drawn from fresh material, 

 Oakland Hills, California, except the leaves 

 of fig. 12.) 



(1) Inflorescence, X 1. 



(2) Habit of plant as normally developed on 



gentle slopes, X 0.07. 



(3) Ray-flower, X 16. 



(4) Style of ray-flower, X 24. 



(5) Disk-flower, X 16. 



(6) Style of disk-flower, X 24. 



(7) Head, X 8. 



(8) Outer bract of the involucre, X 16. 



(9) Middle bract, X 16. 



(10) Inner bract, X 16. 



(11) Leaves showing variation in lobing, all from a 



single platit; most of the leaves are entire or 

 only once pinnatifid; X 1. 



(12) Leaves of an insular form described under minor 



variation 7, X 1. (Material from San Cle- 

 mente Island, California, UC.) 

 Plate 3. 

 Artemisia norvegica heterophylla. (Material from Mount 

 Rainier, Washington, 9776 UC.) 



(1) Stem with leaves and inflorescence, X 1. 



(2) Disk-flower, X 16. 



Artemisia norvegica globidaria. (Material from St. Paul 

 Island, Alaska, 73910 UC.) 



(3) Stem with leaves and inflorescence, X 1. 



(4) Disk-flower, X 16. 



Artemisia norvegica glomerata. (Material from Aia- 

 kamtchetchene Island, Bering Sea, Or.) 



(5) Stem with leaves and inflorescence, X 1. 



(6) Disk-flower, X 16. 



Artemisia norvegica saxatilis. (Material from Pyramid 

 Peak, California, 54076 UC.) 



(7) Stem with basal leaves and a portion of the 



inflorescence, X 1. 



Plate 3 — continued. 



(8) Ray-flower, X 16. 



(9) Outer bract of the involucre, X 16. 



(10) Inner bract, X 16. 



(11) Head, X 8. 



(12) Disk-flower, X 16. 



(13) Style of disk-flower, X 24. 

 Plate 4. 



Artemisia parryi. (Drawn from type specimen, Gr.) 



(1) Stem showing leaves and inflorescence, X 1. 



(2) Outer bract of the involucre, X 16. 



(3) Middle bract, X 16. 



(4) Rav-flower, X 16. 



(5) Disk-flower, X 16. 



(6) Style of a disk-flower, X 24. 



(7) Head, X 8. 



Artemisia senjaviTiensis. (Material from Arakamtchet- 

 chcne Island, Bering Sea, Gr. US.) 



(8) Portion of a mat, showing stem, leaves, and 



inflorescence, X 1. 



(9) Leaf, showing lobes, X 2. 



(10) Head, X 8. 



(11) Ray-flower, X 16. 



(12) Disk-flower, X 16. 



(13) Style of a disk-flower, X 24. 



Artemisia macrobolrys. (Material from above Fort 

 Selkirk, Yukon, Tarleton, NY.) 



(14) Leaf showing the divergent lobes, X 1. 



(15) Ray-flower, X 16. 



(16) Disk-flower, X 16. 



(17) Style of a disk-flower, X 24. 



(18) Head, X 8. 

 Plate 5. 



Artemisia stelleriana. (Material from Ocean Beach, 

 Massachusetts, 193468 UC.) 



(1) Shoot and inflorescence, X 1. 



(2) Style of ray-flower, X 24. 



(3) Ray-flower, X 16. 



(4) Disk-flower, X 16. 



(5) Style of disk-flower, X 24. 



(6) Outer bract of the involucre, X 16. 



(7) Middle bract, X 16. 



Artemisia alaskana. (Drawn from a portion of the 

 type specimen, NY.) 

 (81 Section of the inflorescence, showing the long 



peduncles, X 1. 

 (91 Various types of leaves from same plant, X 1. 

 (101 Ray-flower, X 16. 



(11) Style of ray-flower, X 24. 



(12) Disk-flower, X 16. 



(131 Style of disk-flower, X 24. 

 Plate 6. 

 Artemisia franserioides. (Drawn from fresh material 

 and photo, from San Juan Mountains, Colo.) 



(1) Inflorescence showing the secund arrangement 



of the heads, X 1. 



(2) A pair of lower leaves, X 1. 



(3) Habit sketch of an entire plant, X 0.1. 



(4) Inner bract of the involucre, X 16. 



(5) Outer bract, X 16. 



(6) Head, X 8. 



(7) Ray-flower, X 16. 



(8) Style of ray-flower, X 24. 



(9) Disk-flower, X 16. 



(101 Style of disk-flower, X 24. 



(11) Principal leaf from near base of stem, showing 



the obtuse lobes, XI. 

 Artemisia vulgaris serrala. (Material from northern 

 Illinois, 193540 UC.) 



(12) Portion of inflorescence and a leaf from lower 



down on the stem, X 1. 



