122 



MISSOURI BOTANICAL GARDEN 



size; 2, flower, X 3 ? 3 > stigma, X 37; 4, two capsules, somewhat 



enlarged; 5, seed, X M« 



Plate 20, #. romosissfmuro. — 1, Habit, natural size; 2, two stigmas, 

 X 37; 3, stamen, X 18; 4, germinating pollen grain, X 20° » 6 > elongated 

 erect capsule, X 5; 6 » shorter deflexed capsule, X^i 7, capsule in sec- 

 tion, X 15 » 8 > two seeds, X 18 « 



Plate 21, Q. caesium. — 1, Habit, natural size; 2, flower, X 9» 3, 



stigma, X 37; 4, capsule, X 5 ? 6 » section of capsule, X 15 » 6 > seed, X 



Plate 22, <?. pumilum. — 1-2, Habit, natural size ; 3, flower, X 3 5 *> 



18. 



stigma, X 37; 5,capsule, X 5 > 6 > section of capsule, X !5; 7,tw 



X18. 



Plate 23, Boisduvalia glabella. — 1, Habit, half size; 



half 



two stigmas 



two 



Plate 24, 5. sJncta. — 1, Habit, half size; 2, branch, natural size; 3, 

 opened flower, X 9; *> stigma, X I 8 5 5, capsule, X 5; 6, four seeds, 

 X 18; T> pollen tetrad, X 20 °5 8 > glandular and non-glandular hairs, 



X 200. 

 Plate 25, B. densiflora. — 1, Branch, half size; 2, diagramatic section 



of flower, enlarged; 3, pollen tetrad, X 200 5 *> capsule and bract, 

 natural size; 6, capsule, X 3 » and section X 3; 6 > two seeds, X 18 - 

 Plate 26, B. c leistogama. — 1, Habit, half size; 2, smaller plant, natural 



size 3, capsule, X 5, and section, X 5; 4, stigma, X 1 8 5 6> seed, X 18 - 



Since the preceding pages were written, Raimann's elaboration of 

 Onagraceae in parts 94 and 96 of Engler's Pflanzenfamilien has been 



received* 



and Boisduvalia, on pp. 205 and 212, with figure 



densiflora) . 



16 



• 



* '* 



» 



