Dicotyls or Exogenous Plants. 59 



6. Genus CHRY-SO-SPLE'-NI-UM.— Calyx-tube coherent with the 

 ovary, the blunt lobes 4—"), yellow within; petals none, stamens 8-10. 



Chry-so-sple'-ni-um a-tner-i-ca'-num Schw. Golden Saxifrage. — Small, 

 ■decumbent; leaves principally opposite, roundish or sub-cordate; 

 flowers inconspicuous, nearly sessile; in springs or streams. 



7. Genus HY-DRAN'-GE-A.— Calyx-tube hemispherical, 8-10 ribbed, 

 petals ovate'; flowers in compound cymes, the marginal flowers usually 

 sterile and radiant, consisting of a dilated colored calyx. 



Hy-dran'-ge-a ar-bo-res'-cens L. Wild Hydrangea. — Shrub, 1-8 ft. high. 



8. Genus RI'-BES. — Low, sometimes prickly shrubs with alternate 

 and palmately-lobed leaves; calyx coherent with the ovary, petals 

 perig}-nous. 



A. Mostly with thorns and prickles. 



b. Peduncles 1 to ?y-ftowered, leaves 3 to h-lobed. 



Ri'-bes cyn-os'-ba-ti L. Wild Gooseberry. — Calyx-lobes shorter than 

 the tube ; berries mostly prickly ; • stamens not longer than the bell- 

 shaped calyx. 



Ri'-bes ro-tun-di-fo'-ii-um Mx. Wild Gooseberry. — Calyx-lobes longer 

 than the short tube; peduncles short; filaments long, somewhat ex- 

 ceeding the narrowly oblong-spatulate calyx-lobes; fruit smooth. 



Ri'-bes ox-y-can-thoi'-des L. Wild Gooseberry. — Calyx-lobes as in the 

 last; peduncles ver^- short; stamens usually scarcely exceeding the 

 rather broadly-oblong calyx-lobes ; fruit smooth. 



b. Flowers several in a nodding raceme, leaves 3 to 'y-parted. 



Ri'-bes la-cus-tre (Pers.) Poir. Wild Gooseberry. — Voung stems with 

 bristly prickles and weak thorns; fruit bristh-, small. 



A. U'ithout thorns or prickles. 



Ri'-bes flor'-i-dum L'Her. Wild Black Currant. — Racemes drooping, 

 downy ; fruit black ; leaves lobed, doubly serrate. 



Ri'-bes ru'-brum L. Red Currant. — Racemes from lateral buds dis- 

 tinct from the leaf-buds, drooping, fruit red ; leaves lobed and serrate. 



XXXIV. Order HAIVI-A-IVIE-LI-DA-CE-/E. WITCH-HAZEL FAMILY.— 



Shrubs or trees ; leaves alternate, simple ; flowers clustered in spikes 

 or heads ; the calvx cohering with the base of the ovary. 



