66 



American Midland Naturalist Monograph No. 4 



highway near Zion Tunnel; West Rim trail below Angels Landing; east of the Great 

 White Throne; Lady Mountain; Potato Hollow; Pygmy Forest belt. GRAND CANYON, 

 4,000 to 7,000 feet, in the canyon: Bright Angel trail about lYi miles below South 

 Rim; Kaibab trail on the Tonto north of the Colorado River; Powell Saddle. 



5a. Holly Oak (Var. pimgens 

 Engelm.). — Similar to the species ex- 

 cept the leaves usually somewhat 

 smaller, spine-toothed and crisped 

 along the margins. Holly oak favors 

 dry rocky mountain slopes and 

 ridges. (Syn. Q. pungens Liebm.) 



Occurrence. — ziON, about 4,500 feet: 

 Virgin River, especially in the southwest- 

 ern part of the park; trail from Zion 

 Lodge to Emerald Pools; the Narrows 

 trail. GRAND CANYON in the canyon: 

 north side of the Colorado River, 4,000 

 feet; Kaibab trail below Roaring Springs. 

 Fig. 21. Scrub oak (Qiiercui undulala). 



6. Dwarf Interior Live Oak 

 (Quercus Wisltzcni DC. var. extima Jepson). — Stiffly branched evergreen 

 shrub, 3 to 8 feet high; leaves gray-green, oblong to egg-shaped, % to 1^4 

 inches long, stiff and brittle, smooth above and usually below, the margins 

 not toothed or spine-toothed; acorns slender-cylindric, 2/3 to 1 inch long, 

 maturing during the second summer. 



Occurrence. — sequoia, occasional: near junction of Milk Ranch road with Mineral 

 King road. 



Sweet-gale Family (Myricaceae) 



Wax Myrtle, Sweet-bay (Myrica L.) 



The wax myrtles are uncommon in the parks, occurring only rarely at 

 the lower elevations in parks of the Pacific slope. They are usually good- 

 sized shrubs with fragrant foliage and thickish, dark green, resin-dotted leaves. 

 Inconspicuous flowers without petals are borne in oblong or cylindrical clus- 

 ters, or catkins. Male and female flowers occur separately on the same or 

 on different shrubs. The fruits are small seed-like nutlets. 



Field Guide to the Species 



Leaves more or less hairy, especially below and on the margms, tapering at the base 

 to a slender stalk J/4 to % inch long; nutlets not waxy-coated; occurs in 

 Yosemite National Park 1. M. Harlxoegi. 



Leaves mostly smooth, sometimes very finely hairy below, wedge-shaped at the base, 

 tapering to a very short stalk; nutlets waxy-coated; occurs at Olympic and 

 Isle Royale National Parks 2. M. gale. 



\. Sierra Sweet-bay {Myrica Hartwegi Wats.). — ^Much branched 

 shrub, 3 to 5 feet high; leaves oblong to reverse-egg-shaped, 2 to 3y2 inches 

 long, the margins toothed; male flower clusters about 1 inch long, the seed- 



