1716 AUBORETUM AND FllUTICETUM. PART III. 



a large scar at the base: they have 1 cell, ami 1, 2, or 3 bcciis. — 

 Species few. Natives of the temperate zone of the northern iieniisphere. 

 Leaves alternate, annual, fcather-vcincil, plaited in the bud. (T. Ncrs ab 

 Escnhcck Gen. Fl. Germ.; Smith Eug. i'V., iv. p. 150 — 152.; and obser- 

 vation.) 

 C'o'rylls Lin. Flowers unisexual ; those of the two sexes in distinct cat- 

 kins upon the same plant. — Male flowers in cylindrical catkins. Bracteas 

 sessile, imbricate. Two perigonial scales, that cohere at the base, are 

 adnate to the under surface of the bracteal scale. Stamens 8, inserted 

 upon the perigonial scales towards their base, and in about the line of their 

 cohesion. Anthers bearded at the ti[) of one cell. — Female flowers in a 

 bud-like catkin, which is developed into a branchlet : the flowers are borne 

 at its tip. liracteal scales ovate, entire. Ovaries many, very minute ; 

 grouped ; each invested with minute, lacerated, villous, involucral scales, 

 that cohere at the base; having 2 cells, each including J ovule, and this 

 apparently erect when young, pendulous when adult. Calyx not obvious; 

 formed of a slightly villous membrane, that covers the ovary to the tip, and, 

 as the ovary [)rogresses to a nut, adheres to it most closely, and becomes 

 part of the shell. Stigmas 2, long, thread-shaped. — Fruit. Nut ovate ; 

 included in a large, leafy, tubular involucre, that is lacerate at the tip ; 

 without valves, or, very rarely, with 2 ; scarred at the base ; by abortion, 

 1-seeded. Seed adhering to the remains of the dissepiment. — S|)ecie3 

 few. Large shrubs and trees, occurring in the colder zones of the 

 northern heuiisphcrc. Leaves alternate, entire, feather-veined. Flowers 

 protruded before the leaves. (T. Nees ab Esenbeck Gen. Fl. Fl. Germ., and 

 observation.) 



Ca'hi'inls Totirn. Flowers unisexual; those of the two sexes in distinct 

 catkins upon one plant. — ALile flowers. The catkin lateral, sessile, cylin- 

 drical. The bracteas imbricate. The flower consists of 12 or more sta- 

 mens, inserted at the base of a bractea. Anthers bearded at the tip, 1- 

 ccUed. — Female flowers in lax terminal catkins. Bracteas of 2 kinds, 

 outer anil inner : outer bracteas entire, soon falling off; inner bracteas 

 in pairs, each 3-lobed, with the side lobes nmch the smaller, forming an 

 involucre about an ovary. Calyx clothing the ovary to near its tip, and 

 adhering to it ; toothed at the tip. Ovary with 2 cells, an ovule in each ; 

 the ovule early pendulous : one of them becomes abortive. Style very 

 short. Stigmas 2, long, thread-shaped. — Fruit. Nut attended by the 

 involucre, and ovate, compressed, ribbed, clothed except at the base, and 

 tipped with the adnate thin calyx ; woody; including one seed.^Species 

 about 3. Natives of Europe, the Levant, and North America. Leaves 

 alternate, annual, feather-veined, plaited in the bud. {T. Nees ab Esenbeck 

 Gen. PI. Fl. Germ. Illnslr.) 



O'sTRY.v JMicluv. Flowers unisexual ; those of the two sexes in distinct cat- 

 kins upon the same plant. — Male flowers. The bracteas of the catkin 

 simple, imbricate. F"lower of 12 or more stamens, inserted at the base 

 of a bractea; filaments branched, each branch bearing an anther; anthers 

 each of 1 cell. — Female flowers. Bracteas small, deciduous. Involucral 

 scales in pairs, hairy at the base, the i)air growing together at their o|)posed 

 edges, and constituting an inflated covering to the ovary, which it conceals. 

 Calyx investing the whole ovary, and extended at the tip into a very short 

 ciliate tube. Ovary having two cells, and 1 ovule in each. Style short. 

 Stigmas 2, long, thread-sha|)ed. — Fruit a nut, minute, ovate, even ; bearded 

 at the tip ; 1-seeded from abortion ; covered by an inflatetl, nerved, mem- 

 branous involucre. The fruits of a catkin imbricatcly disposed into an 

 ovate spike. — Species few. Trees, natives of the temperate zones of both 

 liemispheres. Leaves alternate, annual, feather-veined. ('/". Nees ab Esen- 

 I'ick, and observation.) 



