WOOD'S CLASS-BOOK OP BOTANY. XI 



421. What do imperfect flowers lack ? Describe a sterile flower. 

 Describe a fertile flower. Give the emblem of each. ( & , * .) 

 Use of the word diclinous? Explain figures 266, 267, 268, 269, 270. 



422. What is a neutral flower '( (Fig. 271.) 



423. What constitutes an unsymmetrical flower ? Examples. 



424. Describe the flower of mustard. 



425. Describe the flowers of the Mint family, as Monarda, etc. 



426. In what respect are the flowers of poppy unsymmetrical? Of lark-spur? 



Of Monk's-hood ? Describe figs. 280, 281, 282, 283, 284, 285. 



427. What is meant by " organs opposite?" 



428. How is this anomaly explained ? Explain figs. 272, 273, 274, 275. 



429. By what law do " organs increase in number?" 



430. Illustrate this in the lilies. The roseworts. Blood-root. 



432. Illustrate the law of chorisis by figs. 276, 277, 278. 



433. Mention some appendicular organs. 



434. What are spurs in various examples? 



435. What are scales in the various examples cited ? 

 What is the corona in Narcissus? In catchfly? 



436. Describe the " glandular bodies " in grass-Parnassus. 



437. What is said of the frequency of " union of organs ?" 

 How may this union be detected ? 



438. Explain the difference between cohesion and adhesion. 



440. Explain the proper use of the words free and distinct. 



441. What is said of regularity in the early buds of flowers ? 

 Mention certain modes of irregularity in flowers. 



443. Describe a lengthened receptacle. How is this in figs. 288, 287, 286? 



444. Describe the excavated receptacle, as in rose, (fig. 289.) 



446. What is the disk? Describe it in figs. 291, 292, 293. 



447. What is sai 1 of "combined deviations?" 



448. Give an example, in any flower at hand. 



CHAPTER XI. 



449. Can you define, once more, the true idea of the typical flower? 



450. What is the only true distinction between calyx and corolla ? 



451. How are sepals and petals as to number? 



451. How do sepals resemble leaves? How do petals? 



453. What corresponds to blade ? What to petiole ? 



454. In the sepals, what appears to be the analogy? (See fig. 11, a. b. c.) 



455. In outline, what are the forms of petals ? Are they always entire ? 

 State the peculiarity in the petal form of the Umbilifers (297). In 



the petal of duckweed (299). Of campion (296). Of Monk's- 

 hood. Mitrewort (298). 



456. What of the nectary ? 



457. Are the floral organs more likely to be distinct, or united? 



458. What. do we call a calyx with united sepals? 

 What do we call a corolla with united petals ? 

 What terms are opposed to these two ? 



459. What do we understand by the limb ? The tube? 



460. What varieties in the degree of cohesion (figs. 300, 301, 302, 303)? 



461. What sort of cohesion in calyx of Eschscholtzia, or grape? 



463. Why are the outer organs of butter-cup hypogynous ? 



464. In the flower of cherry, why are the stamens perigynous ? 

 Explain the term epigynous ? What two phrases are of the same import? 



466. Please mention two other phrases of the same meaning. 



Describe figs. 304, 305, 306, 307, 308, especially as to the ovary. 

 Also describe figs. 309, 310, 311, as to ovary, etc. 



