2G2 CONVOLVULUS FAMILY. 



G. tricolor, of California: with branching stems, about 1 high, scattered 

 alternate leave* 2-3 time* jiinnately dissected into short linear divi.-ions, flow- 

 er* panicled at the end of the branche-, -hort funnel-form eorolla with lilac- 

 jiur]ile or whitish lobes, brown-]iiir|i|e throat, and yellow tube. i 



G. capltata, of California and Oregon; l-2 high, with alternate leave* 

 twice ('innately divided into small liiu-ar or thread-like leallets ( ,r lobes, and 

 numerous small blue flowers crowded in heads at the end of iiakcd branches ; 

 tlie corolla narrow funnel-form with lanceolate lobes. 



3. POLEMONIUM, GREEK VALKKIAX, JACOB'S LADDER. 

 (Ancient name, from the Greek word for war, or in honor of a philosopher or 

 king named J'o/nnon.) Fl. early summer. ^ 



P. reptans. Woods of Middle States, also cult.: smooth, with weak and 

 spreading (but never creeping) stems 6' -10' long, 7-11 lance-ovate or oblong 

 leaflets, small corymbs of nodding light blue flowers, and stamens and style not 

 longer than the corolla. 



P. caeruleum. Cult, in gardens from Eu., also rarely wild N. : smooth 

 or sometimes hairy ; with erect stem l-3 high, 9-21 mostly lanceolate and 

 crowded leaflets, clusters of bright blue flowers collected in a long panicle, and 

 stamens and style longer than the lobes of the corolla, which is 1' broad. 



4. COB.S1A. (Named for one Cobo, a Spanish priest in Mexico, from which 

 country the common species was introduced into cultivation.) 2/ 



C. SCandens. Smooth, tall-climbing by its much branching tendrils ; 

 leaflets ovaf ; dull purple or greenish corolla 2' or more long, long filament* 

 coiling spirally when old : 11. all summer, usually cult, as an annual. 



83. CONVOLVULACE^I, CONVOLVULUS FAMILY. 



Twiuing, trailing, or rarely erect plants, (ours herbs,) commonly 

 with some milky juice, alternate leaves, no stipules; regular mono- 

 petalous flowers with 5 (rarely 4,) imbricated sepals, as many 

 separate stamens, corolla convolute or t \vi.-t ed in the bud, a 

 2-4-celled ovary and pod with only 1 or 2 ovules erect from the 

 base of each cell, becoming largo seeds containing a curved or 

 coiled conspicuous embryo in some mucilaginous (or when dry, 

 harder) albumen. 



I. CONVOLVULUS FAMILY PROPER ; with ordinary foli- 

 age, axillary peduncles bearing one or more usually showy flowers, 

 nnd embryo with broad leaf-like cotyledons folded and crumpled in 

 the seed. (Le.-son*, p. 21, fig. 40-43.) Calyx of 5 separate sepals. 



1. Style sint/le and entire : sttymiie 1 - 3. 

 * Ctyx naked, i. e. not enclosed by it // iir <>/' /< //}/ bracts. 



1. QUAMOCLIT. Corolla nearly salvor-shaped nr trumpet-shaped, with a long 



tube, tin- border not twisted in the hud. Stamen* and style commonly pro- 

 truded. Stigma capitate, more or le>s 2-lobed. 1'ud 4-ceiled: cells 1-seeded. 

 (Lessons, p. 101. lig. -JK-J. 203.) 



2. IPOMCEA. Corolla variou-, nmre commonly funnel-form, the border twisted 



in tlie bud. Stamens mostly included. Stigma capitate, commonly 2 -8-lobed. 

 1'od 2-4-celled. 



8. COXVOLVl'I.rs. Corolla open funnel-form or almost hell-shaped. Stamens 

 included. Stigmas 2, linear. 1'od _' celled: cells 2-seeded. 



* * Gilyx surroundiil und enclosed b// <i pair of l<irge leafy heart-shiijii-il bntctg. 



4. CALTSTEGIA. Corolla o[>en funnel-form, the wide-spreading border obscure- 

 ly lobed or entire. Stamens included. Style bearing 2 linear or oblong 

 stigmas. 1'od 4-seeded. I'eduncles 1-nowered. 



