144 PROCEEDINGS OF THE AMERICAN ACADEMY 



dist'nct : flowers white : calyx-teeth obsolete : fruit somewhat pubes- 

 cent, rounded to ovate,. three to five lines long, two to four wide; ribs 

 prominent ; vittae two or three in the intervals (sometimes four in the 

 lateral ones, perhaps sometimes solitary), four to six on the commis- 

 sure. — 7"*. nudicaule, AVatson, Bot. King's Rep. 130, and others ; not 

 Nutt. Eastward of the Sierra Nevada froni N. E. California to Souora 

 and New Mexico. 



Aralia Californica. Herbaceous, unarmed and nearly glabrous, 

 eight to ten feet high, from a deep thickened root : leaves bipinnate, 

 or the upper pinnate with one or two pairs of leaflets ; leaflets cordate- 

 ovate, four to eight inches long, shortly acuminate, simply or doubly 

 serrate with short acute teeth ; terminal leaflets ovate-lanceolate : umbels 

 in loose terminal and axillary compound or simple racemose panicles, 

 wdiicli are more or less glandular-tomentose ; rays numerous, four to 



* * Fruit oblong : caulescent, glabrous. 



14. P. BicoLOR, Watson, 1. c. Stem short ; peduncle elongated : rays few, 

 very unequal : involucel of a few linear bractlefs : fruit on short pedicels, 5 to 6 

 lines long, narrowing from near the base, narrowly winged ; ribs filiform ; vittae 

 obscure. — Wahsatch Mountains. 



§ 4. Leaves smaller, much or finely dissected with small segments : flowers 

 yellow : involucels present : low, acaulescent. 



15. P. viLLOScjr, Nutt. More or less densely pubescent : leaves of very 

 numerous crowded narrow segments : umbels dense in flcjwer : involucels small : 

 fruit oval, pubescent, 3 or 4 lines long ; vittse several in the intervals. — W. 

 Nevada to Nebraska and S. Utah. 



16. P. Parkti, Watson. See above. 



§ 5. Leaves much dissected with small segments : flowers white ; involucels 

 present : usually low, somewhat caulescent or scarcely so, more or less pubes- 

 cent. 



* Fruit glabrous, oblong or broadly elliptical ; vittiB usually solitary. 



17. P. siACROCARPDM, Nutt. Morc or less pubescent : involucels conspicu- 

 ous, somewhat foliaceous : fruit 4 to 10 lines long, 2 or 3 wide ; calyx-teeth 

 evident ; ribs filiform ; vitta3 rarely 2 or 3 in the intervals, 2 to 4 on the commis- 

 sure. — Var. EURYCAuruM, Gray. Fruit broader : leaves rather more coarsely 

 divided. — Washington Territory to N. California and east to the Saskatciia- 

 wan ; the variety from Oregon to the Sacramento. 



18. P. NcniCAULE, Nutt. Nearlj' glabrous : involucels small : fruit elliptical, 

 2 or 3 lines long ; calyx-teeth obsolete ; ribs prominent ; vltfa? always solitary, 

 2 to 4 on the commissure. — Nebraska and N. Colorado to Idaho. 



* * Fruit tomentose or puberulent, oval-orbicular j vittae usually several in the 

 intervals. 



