62 UETICACEAE 



Plants with subterranean stems : in pinelands. 



Leaf-blades entire : cup saucer-shaped to hemispheric ; nut rounded at the apex. 



1. Q. ptimila. 

 Leaf-blades (lower) pinnatelv toothed or lobed : cup turbinate: 



nut tapering. 2. Q. minima. 



Plants with erect stems : in hammocks. 



Cup turbinate or hemispheric : nut long : leaf-blades pale be- 

 neath, pubescent. 3. Q. rirginiana. 

 Cup saucer-shaped : nut very short : leaf-blades not pale be- 

 neath, glabrous. 4. Q. myrtifolia. 



1. Q. pumila Walt. Shrub with underground stems, the branches 3-6 dm. 

 tall, or sometimes taller: leaf -blades narrowly oblong, varying to lanceolate 

 or oblanceolate, 5-12 cm. long, finely tomentose beneath, entire, sometimes 

 slightly crisped: acorns sessile or nearly so; cup saucer-shaped, sometimes 

 deeply so, 12-15 mm. wide; nut ovoid, 10-15 mm. long. — Pinelands. 



2. Q. minima (Sarg.) Small. Shrub with underground stems, the branches 

 less than 1 m. tall: leaf-blades obovate, or sometimes oblong or oblanceolate 

 in outline, 3-10 cm. long, glabrous or finely pubescent beneath, repand- 

 toothed, or those of the upper leaves sometimes entire: acorns solitary or 

 several on a peduncle ; cup hemispheric, about 15 mm. wide ; nut ovoid or 

 elliptic, 15-18 mm. long. — Pinelands. 



3. Q. virginiana Mill. Tree becoming 30 m. tall: leaf -blades oval or oblong, 

 varying to obovate or oblanceolate, 3-12 em. long, entire, smooth; acorns 

 solitary or spicate on peduncles; cup hemispheric, 15-20 mm. wide; nut ovoid 

 or oblong-ovoid, 20-25 mm. long, twice as long as the cup. — Hammocks. — 

 (Cuba.) — Ln'E-OAK. 



4. Q. myrtifolia Willd. Shrub, or tree becoming 6 m. tall: leaf-blades 

 obovate or oval, 2-5 em. long, entire, shining above, dull beneath: acorns 

 sessile or nearly so; cup saucer-shaped, 10-13 mm. wide; nut ovoid or oblong- 

 ovoid, 10-14 mm. long. — Hammocks. 



Order URTICALES. 



Shnibs or trees, or herbs. Leaves alternate, or in the case of herbs 



often opposite : blades simple, entire, toothed, or divided. Flowers various, 



not in aments. Calyx present. Corolla wanting. Androecium often of 



as many stamens as there are sepals. Gynoecium of a single carpel or of 



2 united carpels. Fruit an achene, a samara, drupe, syncar]-), or syconium. 



Fruit an achene, the achenes sometimes in the accrescent sepals and disposed In a 

 syncarp. 

 Flowers not on a receptacle : fruits not forming syncarps : sepals neither thick 



and juicy, nor enveloping the achenes. Fam. 1. Urticacbab. 



Flowers on the outside or inside of a receptacle : fruits 

 forming syncarps : sepals accrescent, enveloping the 



achenes. Fam. 2. Artoc-vkpaceae. 



Fruit a samara or a drupe, sometimes nut-like. Fam. 3. Ulmaceae. 



Fajiily 1. URTICACEAE. Nettle Family. 



Herbs or shrubby plants (ours), often Avith stinging hairs. Leaf- 

 blades entire, toothed, or rarely lobed. Flowers dioecious, monoecious, or 

 polygamous, cymose. Calyx of 2-5 distinct or partially united sepals. 

 Androecium of 2-.5 stamens. Gynoecium a single carpel. Fruit an achene. 



Flower-clusters not Involucrate : leaves mostly opposite. 



Sepals of the pistillate flowers distinct or nearly so, not Investing the achene: 



ptigma tufted. 1- Pilea. 



Sepals of the pistillate flowers united, the tube Investing the 



achene : stigma elongate. 2. Boeiimbhia, 



Flower-clusters involucrate : leaves mostly alternate. 3- Parietaria. 



