io8 PHLOX ORDER 



yellow, united into a bell-shaped, or funnelform corolla, rarely wheel- 

 shaped, stamens 5, inserted near the base of the corolla, ovary ovoid, cap- 

 sule ovoid, obtuse, 3-valved ; flowers in open or close cyme-like panicles ; 

 leaves alternate, pinnate ; perennials or rarely annuals. 



1. Corolla funnelform, 2-3 cm. long, its tube longer 



than calyx or limb 



a. Leaflets whorled, crowded 



(1) Flowers blue in a dense cluster P.confertum 



(2) Flowers yellowish in an open often inter- 



rupted cluster P. c. mellitum 



b. Leaflets two-rowed, often paired P. speciosuin 



2. Corolla bell-shaped, 1-2 cm. long, its tube about 



the length of the calyx, and shorter than the 

 limb 



a. Stems spreading, clustered, 1-12 in. high; stem 



leaves few P. pulchellum 



b. Stems erect, usually single, 2-4 ft. high, leafy P. caeruleum 



CONVOLVULACEAE MORNING GLORY FAMILY 



Sepals 5, united, petals 5, united into a funnelform, salverform, or 

 bell-shaped corolla, stamens 5, inserted low down on the tube of the co- 

 rolla, ovary 2-3-celled with 2 ovules in each cell, or falsely 4-6-celled with 

 a single ovule in each cell, entire or 2-4-divided, styles 1-3, fruit a 2-4- 

 valved capsule or of 2-4 distinct carpels ; flowers solitary or in axillary 

 cymes ; herbs with twining, trailing or erect stems, and alternate, entire 

 to lobed or dissected leaves. 



1. Low silvery-silky herb; styles 2, 2-forked EVOLVULUS 



2. Stems twining or trailing, or bushy and shrub- 



like; style 1 



a. Stigmas globose; flowers mostly blue to red IPOMOEA 



b. Stigmas oblong to linear; flowers white or 



pinkish CONVOLVULUS 



CONVOLVULUS Linne 1753 BINDWEED 

 (Lat. convolve, twine around) 



Sepals 5, united, petals 5, pink, purple or white, united into a funnel- 

 or bell-shaped corolla, stamens 5, inserted on the tube of the corolla, in- 

 cluded, ovary with 1-2 cavities, ovules 4, style slender, stigmas 2, thread- 

 like, oblong or ovoid, capsule globose or nearly so, 2-4-valved; flowers 

 axillary, solitary or clustered; leaves 'entire, toothed or lobed, mostly 



