JUGLANDE^;. 301 



2. P. Fremonti, Wats. Large tree with, broad rounded or depressed 

 head, gray, cracked bark, and subterete branchlets: leaves deltoid-ovate, 

 sinuate-crenate; petioles flattened, and, with the branchlets and leaf- 

 margins, often pubescent when young: bracts and rachis of aments 

 glabrous: fruiting aments 3—4 in. long: capsules ovate, 3 — 4 lines long, 

 on stout pedicels 1 — 2 lines long; disk )£ m - broad: valves of capsule 3: 

 seeds white. — Valleys among the ooast ranges, and also on plains of the 

 interior. 



Order LXXXV. JUGLANDEiC. 



Represented by a single species of the genus 



1. JUGLANS, Pliny (Walnut Tree). Trees with hard wood, and 

 alternate exstipulate unequally pinnate somewhat resinous-aromatic 

 leaves. Staminate flowers in long aments, 12 — 40 stamens to each of the 

 3-lobed green perianths; pistillate solitary, or few and spicate, their 

 calyx adherent to the ovary, 4-toothed and bearing 4 small petals. Pistil 

 1; style short; stigmas 2, linear or clavate, fringed. Pericarp large, 

 fleshy, indehiscent, enclosing a rugose nut. Seed without albumen; 

 cotyledons fleshy, 2-lobed, rugose. 



1. J. Californica, Wats. Tree 40—60 ft. high; trunk 2— 4 ft. thick: 

 leaflets 5—8 pairs, oblong-lanceolate, acute, 2 — 2J^ in. long: aments 

 loose, 4 — 8 in. long: fruit globose, little compressed, 1 in. thick: nut 

 shallow-sulcate. — Frequent along streams, chiefly back from the seaboard. 



Obder lxxxvi. CUPULIFER/€. 



Monoecious trees or shrubs, with alternate simple pinnate-veined 

 leaves, caducous stipules, and staminate flowers in cylindrical usually 

 pendulous aments. Individual staminate fl. with a lobed or cleft 

 perianth. Pistillate sessile in a cup-like involucre (1 — 5-flowered) covered 

 with bract-like or spinescent appendages; perianth 6-lobed, adherent to 

 the 2— 6-celled and 4 — 12-ovuled ovary, this becoming a 1-celled 1-seeded 

 nut inserted in or enclosed within an involucre. Seed without albumen; 

 cotyledons large, fleshy. 



1. QUERCUS, Pliny (Oak). Staminate flowers in slender usually 

 pendulous aments; calyx 4— 8-lobed or -parted; stamens 3 — 10; anthers 

 2-celled. Pistillate flowers single or in clusters; ovary 3-celled, 6-ovuled, 

 bearing 3 styles or sessile stigmas, and enclosed by a scaly bud-like 

 involucre which enlarges into a cup around the base of the rounded or 

 elongated nut (acorn), the 5 undeveloped ovules remaining as rudiments 

 at base or summit of the perfect seed. 



