Explanations of Plates 1 to 23, Genus Artemisia. 



Plate 7. 

 Arlemisia vulgaris tilesi (the tall form, = A. elatior). 

 (Material from the Klondyke River at 

 Dawson, Canada, vSF.) 



(1) Inflorescence; this much more elongated and 



with smaller heads than in typical tilesi, X 1. 



(2) Leaf from middle portion of the stem, X 1. 

 Artemisia vulgaris typica. (Material from along St. 



John River, Maine, 29797 UC, the detached 

 leaves from near Andover, New Jersey, 

 29801 UC.) 



(3) Inflorescence, X 1. 



(4) Lower leaf, X 1. 



(5) Middle cauline leaf, X 1. 



(6) Upper cauline leaf, X 1. 



(7) Cluster of leaves from the same stem as 3, X 1. 



(8) Disk-flower, X 16. 



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



(10) Head, X 8. 



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



(12) Ray-flower, X 16. 



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



(14) Inner bract, X 16. 



Plate 8. 

 Artemisia vulgaris heterophylla. (Drawn from a 

 living plant, Berkeley, California.) 



(1) Upper portion of the inflorescence, X 1. 



(2) Habit sketch of a portion of a plant; the low 



shoots are from rootstocks connected below 

 the surface with the larger stems; X 0.03. 



(3) Series of leaves so arranged as to preserve the 



original sequence up the stem, X 1. 



(4) Lower leaf from the same plant but gathered 



earlier in the season, X 1. 



(5) Disk-flower, X 16. 



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



(7) Ray-flower, X 16. 



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



(9) Head, X 8. 



(10) Middle bract of the involucre, X 16. 



(11) Inner bract, X 16. 



Plate 9. 



Artemisia vulgaris gnaphalodes. (Drawn from fresh 

 material from Reno, Nevada.) 



(1) Inflorescence and a portion of the leafy stem, 



showing lobed leaves in the middle, with 

 entire ones both below and above, X 1. 

 Artemisia vulgaris wrighti. (Drawn from fresh material 

 from Colorado Springs, Colorado.) 



(2) Top of plant with inflorescence, X 1. 



(3) Head, X 8. 



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



(5) Inner bract, X 16. 



(6) Ray-flower, X 16. 



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



(8) Disk-flower, X 16. 



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



Artemisia bigelovi. (Drawn from fresh material from 

 Caflon City, Colorado.) 



(10) Main portion of stem with inflorescences, X 1. 



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



(12) Inner bract, X 16. 



(13) Head, X 8. 



(14) Ray-flower, X 16. 



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



(16) Disk-flower, X 16. 



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



Plate 10. 

 Artemisia annua. (Material from St. Louis, Missouri, 

 193447 UC.) 



(1) Inflorescence, X 1. 



(2) Leaves from middle portion of the stem, X 1. 



(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) Inner bract, X 16. 



Artemisia klotzschiana. (Material from Pachuca, 

 Hidalgo, 135382 UC.) 



(10) Upper portion of inflorescence, X 1. 



(11) Middle portion of stem, with leaves, X 1. 



(12) Head, X 8. 



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



(14) Inner bract, X 16. 



(15) Ray-flower, X 16. 



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



(17) Disk-flower, X 16. 



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



Artemisia biennis. (Drawn from living plants, 

 Berkeley, California.) 



(19) Principal leaves from middle part of stem, X 1. 



(20) Upper portion of inflorescence, X 1. 



(21) Head, X 8. 



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



(23) Inner bract, X 16. 



(24) Ray-flower, X 16. 



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



(26) Disk-flower, X 16. 



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



(28) Habit sketch, X 0.025. 



Plate 11. 

 Artemisia absinthium. (Drawn from living material 

 from the Botanical Garden, University of 

 California.) 



(1) Portion of shoot and inflorescence, X 1. 



(2) Disk-flower, X 16. 



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



(4) Head, X 8. 



(5) Narrow outer bract of the involucre, X 16. 



(6) One of the principal bracts, X 16. 



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



(8) Ray-flower, X 16. 



Artemisia frigida. (Drawn from living material grow- 

 ing near Manitou, Colorado; the details from 

 material collected on the Laramie Plains, 

 Wyoming.) 



(9) Inflorescence, X 1. 



(10) Leaf from midway up the stem, X 1. 



(11) Head, X 8. 



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



(13) Inner bract, X 16. 



(14) Ray-flower, X 16. 



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



(16) Disk-flower, X 16. 



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



(18) Habit sketch of an entire plant, X 0.125. 



Plate 12. 

 Artemisia pattersoni. (Drawn from fresh material 

 from Pike's Peak, Colorado.) 

 (1) Entire plant, X 1. The details of heads and 

 flowers are similar to those of A. scopvlorum, 

 except that the parts are larger and the 

 corollas glabrous. 



