DICOTYLEDONOUS PLANTS 119 



III. DAU'CUS, Carrot, Rattlesnake Weed 



Calyx 5-toothed, fruit oblong, with the primary ribs bristly, 

 and the secondary ones winged with a row of barbed prickles 

 more or less united. Oil tubes under the wings. Leaves 

 much dissected with very small segments. Involucres like 

 the leaves, but smaller. Outer rays of the umhel longest and 

 folding over the others in fruit. Flowers greenish. 



D. pusil'lus Michx. Yerba de la Yibora, Rattlesnake AYeed. 



Annual, erect, simiDle or branched, with the umbels terminating the 

 stems. The fruit tastes something like lemon peel. This is the 

 most widely accepted antidote for the bite of the rattlesnake. 

 Widely distributed. 



CORNA'CE.®. Dogwood Family 



Generally trees or shrubs, with opposite simple and entire 

 leaves without stipules. Flowers in heads or cymes. Sepals, 

 petals, and stamens 4. Calyx adnate to the 1 or 2 celled 

 ovary, which becomes a 1 or 2 seeded drupe or berry in fruit. 

 The seeds have hard endosperm and a minute embryo. 



COR'NUS, Dogwood 



Calyx minutely 4-toothed. Petals white or yellowish green. 



a. C. Nuttal'lii Audubon. Lakge-flowered Dogwood. This 

 is usually a small tree with smooth bark. Flowers numerous in a 

 head surrounded hy a conspicuous involucre of large ivhite or yellowish 

 bracts often tinged ivith red and resendAing petals. Berries bright red 

 in clusters. This grows along streams, chiefly in the northern part 

 of California. 



b. C. pubes'cens var. Califor'nica C. & R. Common Dogwood. 

 Shrubby, with smooth, reddish branches. Leaves ovate to oval, 

 acute at base, acute or pointed at top. Flowers white in cymes, 

 flowering almost throughout the year. Fruit dull white, rounded, 

 with stone somewhat flattened, ridged on the sides and fm-rowed on 

 the edge. This is common throughout the state, growing along 

 streams. 



c. C. stolonif'era Michx. Shrub 3-9 ft. high, bearing stolons. 

 Stems bright red-purple and smooth. Leaves lanceolate to oblong, 



