114 CISTINE^ (rock-rose FAMILY.) 



4. CAYL.USEA, St. Hilaire. Caylusea. 



Sepals 5, persistent, tlie upper smaller. Petals 5, the upper larger 

 with many-parted limb. Stamens 10-15. Disk one-sided, upper border 

 much dilated. Gynophore elongated, slender. Carpels free, whorled 

 at apex of gynophore, boat-shaped, tapering, 1 -celled, gaping toward 

 axis ; margin of fissure ciliate, 1-seeded. Placentas cushion-like, at apex 

 of gynophore — Annual herbs, with aspect of Reseda Luteola, L., with 

 entire leaves, and flowers in spike-like racemes. 



C. caue§ceii§, L. DhundbaJi .3 to .4, papillose-hairy, erect 

 or ascending, branching from base and above. Leaves oblong to linear- 

 lanceolate, often .04 to .05 long, spreading, often with wavy borders. 

 Flowers short-pedicelled, bracts soon deciduous — Spring — Torrid 

 valleys about Dead Sea, and southward to Arabia. 



Var. prostrata, Post. Prostrate. Leaves .005 to .03 long, 

 sparse — Sinai. 



Order IX. CISTI^fEiE, (Rock-Rose Family). 



Shrubs or herls with regular flowers^ clistinGt, hypogy- 

 nous ^ indefinite stamens y a persistent calyx ^ caducous corol- 

 la^ incompletely several-celled ovary .^ with as many parietal 

 placentcB as valves, and orthotropous, alhuminous seeds — 

 Sepals 6, the outer two often bract-like, sometimes caducous, 

 the other three a little twisted in the bud. Petals 5, twisted 

 in the bud in a direction opposite to the sepals. Style 

 simple. 



* Capsule incompletely 5-10-celled. Flowers pink or white, never yellow. 



1. CISTUS. All the stamens fertile. 



* * Capsule 1- or incompletely 3-celled. Flowers yellow, pink or white. 



2. HELIANTHEMUM. All the stamens fertile, 



3. FUMANA. The outer stamens sterile, necklaee-form, 



1. CISTUS, L. Rock-Rose. Labdanum. Ladhanum. 



Sepals 3-5. Petals 5. Stamens numerous, all fertile. Capsule in- 

 completely 5-10-celled, spliting down the middle of the valves ; placen- 

 tae next to the axis ; seeds orthotropous ; embryo spiral — Shrubs 

 with large showy pink or white flowers, and wrinkled, exstipulate 

 leaves. 



1. C. Tillosus, L. 5 Crhibrah. .3 to 1 or more, more or less 

 viscid, villous. Leaves elliptical or obovate-oblong, often wavy. 

 Flowers 3-5, with s/ior^ peduncles, arranged in umbel-like cymes; sepals 

 nearly equal, ovate, acuminate; petals j^i??^ with yellow base ; style 

 as long as ovary — Spring — Shrubby hillsides ; throughout. A drink 

 resembling tea is made of its leave*. 



Yar, gcnuinu§, Boiss. Densely woolly, and villous with long 

 hairs. Leaves large. 



Var. €rcticu8, Boiss. Sparingly woolly. Leaves smaller. 



