72 PINK ORDER 



(2) Leaves ovate A. nyctaginea 



2, Involucre 3-lobed; fruit winged A. incarndta 



Allioniella Rydberg 1902 

 (Diminutive of Allionia) 



Sepals mostly 5, corolla-like, united into a bellshaped tube, petals none, 

 stamens 3, ovary 1-celled, stigma globose, fruit a ribbed achene ; flowers 

 usually 3 in a saucer-shaped involucre ; leaves opposite simple entire ; peren- 

 nial. 

 Flowers rose-purple, 1 cm. long; leaves heart-shaped, 



sticky A. oxybaphoides 



Mirabilis Linne 1753 Four-o'clock 



(Lat. mirabilis, wonderful, from the flowers) 



(Quamoclidion DC.) 



PI. 8, fig. 2. 



Sepals mostly 5, corolla-like, united into a funnelform tube, rose-purple, 

 petals none, stamens 5, ovary 1-celled, stigma globose, fruit an achene with- 

 out ribs ; flowers usually 5-6 in a bellshaped calyx-like involucre ; leaves 

 opposite, simple and entire; perennial. 



Flowers rose-red, 4-5 cm. long ; leaves ovate, smooth M. mitltiiiora 



SALICACEAE WILLOW FAMILY 



Sepals 0, petals 0, stamens 1-60, ovary 1-celled, stigmas 2, often 2-4- 

 cleft, fruit a small capsule, splitting into 2-4 parts, seeds many, tiny, cottony ; 

 flowers in catkins, the stamen and pistil flowers on different trees ; trees or 

 shrubs with alternate simple leaves. 



1. Trees, mostly with rounded or ovate leaves ; buds 



covered with several scales Populus 



2. Shrubs, or sometimes trees, mostly with lanceo- 



late or lance-oblong leaves ; buds covered with 



a single scale Salix 



Populus Linne 1753 Poplar, Cottonwood, Aspen 

 (L. populus, poplar, probably from the root *pal, to shake) 



Plate 11. 



Sepals and petals none, but the disk often cup-like, stamens 6-60, ovary 

 1-celled, stigmas 2-4, entire or lobed, fruit 2-4-valved, smooth or hairy; 



