binate

1 Leaves binate, from 10 to 20 cm. long, stout and rigid; resin-ducts medial, hypoderm multiform, the inner cells gradually larger, remarkably large in the angles of the leaf.

2 The spikes are very short at the ends of very fine branches, solitary, binate or fascicled, with very fragile rachis; joints are very short, slender with cupular tips.

3 But in my variety the increase of the number of the leaflets may extend to these primary organs, and make them binate or even ternate.

4 Leaves binate, ternate, or both, from 10 to 15 cm. long, stout and rigid; resin-ducts external, or external and medial.

5 The spikelets are solitary or binate, dorsally compressed, pale green or reddish, very shortly pedicelled, 1/4 to 5/16 inch long inclusive of the short awn, pedicel is cupular at the tip.

6 Its short binate leaves, the persistent long prickles of its cone, and its tough branches, combine to distinguish this Pine from its associates.

7 Racemes binate, pedicelled spikelets differing from the sessile, glume I of the sessile spikelets deeply channelled.

8 Spikelets binate below and 3-nate at the top on a spicate or panicled inflorescence 28.

9 The male spikelets are solitary, or binate and then one sessile and one pedicelled, 2-flowered, reaching 3/8 inch in length and consist of four glumes each.

10 Spikelets are binate, 1-flowered, all alike, both pedicelled, articulate at the base and hidden by the very long silky hairs arising from a small callus and from the glumes.

11 It is recognized by its smooth branches, binate leaves and numerous, often multiserial, clusters of persistent, often closed, cones.

12 The spikes usually solitary, but occasionally binate, 6 to 10 inches long; rachis is quite smooth and dorsally rounded.

13 The spikelets are linear-lanceolate, solitary or in distant pairs, glabrous or ciliate, pedicelled and when binate the upper pedicel often longer than the spikelets, usually spreading and not appressed to the rachis.

14 The spikelets are oblong-lanceolate, acute, about 1/10 inch long, binate, one pedicelled and the other subsessile, the pedicel is angular, about 1/2 to 2/3 the length of the spikelet.

15 The spikelets are oblong, acute, binate, one pedicel being shorter than the other, usually appressed to the rachis and not spreading.

16 Leaves binate, sometimes ternate, from 15 to 30 cm. long, rigid, erect; hypoderm of uniform thick-walled cells; resin-ducts of remarkable size, septal, or not quite touching the endoderm and technically external.

17 The inflorescence consists of solitary, binate, digitate, or panicled racemes.

1 成对的

double duplicate conjugate paired bigeminal twin geminate gemel zygo- didymous twinned

2 成对

double duplicate conjugate paired zygo- conjugation pair geminate couple twin bigeminal gemel match didymous twinned twinning

3 双生的

biparous geminal twin didymous geminate gemel twinned twinborn

4 双生

didymous twinned geminate twinborn twin gemination twinning