(217 j 
5. §.Counteri Anders. Monandrous: 
aments in the axils of persistent leaves.— 2. 
Marin County. Spring. 
* 2, Populus Tourn. 
Popiar. Corronwoop. 
Bracts fimbriate, laciniate.— b. 
1. P. rrichocaRpa Torr. & Gray.— bh. Ma- 
rin County. Niles. Spring. 
Orprr 8. PARIETALES. Ovary 1-celled; 
placentation parietal; ovules o. 
Family 1. CISTINEZA. 
Calyx 2-seriate; 2 external sepals smaller 
than the 3 internal, contorted to the left in 
estivation, sometimes 0. Petals 5, caducous, 
contorted to the right in westivation. Stamens 
co. Ovary free, formed by several connate 
carpidia; style 1.- Fruit a capsule; placenta- 
tion sometimes apparently axillary, by pla- 
cente protruding towards the center. 
1. Helianthemum Tourn. Rock-Ross. 
Ovary 3-valved. Placents in the middle of 
the valves; each valve more than 2-seeded. 
Flowers yellow. 
1. H. scopartum Nutt.—2%. Tamalpais. 
Summer. 
Family 2, LOASACEZ. 
Calyx-tube more or less connate with the 
10 
