The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . at is a peduncle ? May it bear leaves ? Whatthe pedicels ?—Rachis ? When is a flower sessile? 344. How does a scape difier frompeduncle ? Where is the torus ? 345. What are bracts ?—Bractlets ? How are the bractsin Crucifers ? What of color ? 346. Define spathe. Illustrate. 347. Define involucre—Involucel. 348. Describe a (so-called) compound flower. Wh
The American botanist and florist; including lessons in the structure, life, and growth of plants; together with a simple analytical flora, descriptive of the native and cultivated plants growing in the Atlantic division of the American union . at is a peduncle ? May it bear leaves ? Whatthe pedicels ?—Rachis ? When is a flower sessile? 344. How does a scape difier frompeduncle ? Where is the torus ? 345. What are bracts ?—Bractlets ? How are the bractsin Crucifers ? What of color ? 346. Define spathe. Illustrate. 347. Define involucre—Involucel. 348. Describe a (so-called) compound flower. What is the chafl? 349. InGrasses, what are the glumes ?—The pales ? 350. What is the nature of the cup in Oak ?Why is axillary infl. called indefinite ?—Why centripetal ? Why is terminal infl. definite ?—Why centrifugal ? How are both combined in Compositis ? CHAPTER XXYI. SPECIAL FOEMS OF INFLORESCENCE. 355. Of centripetal or axillary inflorescence the prin-cipal varieties are the spike, spadix, catkin, raceme, corymb,umbel, panicle, thyrse, head. Tlie s2nJce is a long rachis with 118 STRUCTURAL BOTANY. sessile flowers either scattered, clustered, or crowded upon it,as Plaritain, Mullein, Yervain. The so-called spikes of the. 435, Spiranthes cernua—flowers in a twisted spike. 436, Orontiuin aquaticum—flowers on a nakedspadi:v. 437, Betula lenta—flowers in ameuts. Grasses, as Wheat, Timothy, are in fact compound spikes^ bear-ing little spikes or spihelets in place of single flowers (440).
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbotany, bookyear1870
