232 CISTACEAE. 



calyx-lobes, hypogynous, narrowed to a claw which bears 

 an appendage on its inner face. Stamens 4-7 or rarely 

 more, hypogynous; anther 2-celled, longitudinally de- 

 hiscent. Ovary 1-celled, with 2-4 parietal placentae; 

 styles 2-4-cleft into filiform divisions. Capsule invested 

 by the persistent calyx. Seeds few, on slender funiculi 

 which are attached to the margin of the valves. 



1. FRANKENIA L. 

 Characters of the family. 



1. F. grandiflora Ch. & Sch. Stem much branched from a some- 

 what woody base, more or less erect, slender, 1-3 dm. high, glabrous 

 or soft-pubescent, very leafy; leaves obovate to narrowly oblance- 

 olate, revolute, 6-12 mm. long, dull green; calyx linear, 6 mm. 

 long, strongly furrowed, the lobes short, acute; petals small, red, 

 the blade 2 mm. long or more, erose at the summit, the appendages 

 of the claw bifid; stamens 4-7; style 3-cleft; capsule shorter than 

 the calyx, linear, angular; seeds numerous. 



Common in saline marshes. Flowering all summer. 



Family 66. CISTACEAE. Rock-rose Family. 



Shrubs or low woody plants with alternate or opposite 

 simple leaves, and solitary, racemose, clustered or panicu- 

 late, regular, generally perfect flowers. Sepals 3-5, 

 persistent, when 5 the 2 exterior smaller and bract-like, 

 the inner 3 convolute. Petals 5 or 3 or sometimes want- 

 ing, fugacious. Stamens many, hypogynous. Ovary 1, 

 sessile, 1-several-celled ; ovules orthotropous, stalked; 

 style simple; stigma entire or 3-lobed. Capsule dehis- 

 cent by valves. Seeds several or numerous; embryo 

 slender; endosperm present. 



1. HELIANTHEMUM L. 



Woody herbs or low shrubs, more or less branching, 

 mostly with showy yellow flowers. Petals 5, yellow, 

 fugacious. Stamens numerous. Placentae or false septa 

 3, ovules few-many; style short or filiform or spatuate, 

 jointed with the ovary; stigma capitate or 3-lobed. 

 Embryo curved. 



