1782 TENNESSEE 



tion: English walnuts, paper-shell pecans, Paragon 

 chestnuts, aud Japanese persimmons grafted on the 

 common persimmon. j{. L. Watts. 



TEN-O'CLOCK. Ornithcgahim umbellattim . 



TEN-WEEKS STOCK. MatMola incana, var. annim. 



TEOSINTE is an annual grass of immense value for 

 forage in the South. It is very much like maize in gen- 

 eral appearance and in the structure of the fls., but 

 differs in not forming an ear, the slender iointed spikes 

 being free from one another. By many botanists it is 

 considered the original form of maize. It is known to 

 catalogues as Eeana hixurians, Dur., but is properly 

 Euchlmna Mexic&na, Schrad., for the botany of which 

 see B.M. 6414, where the plant is called Euchhana lux- 

 urians. The plant is pictured in Bull. 14, Div. of 

 Agrost., U. S. Dept. of Agric, and in Farmers' Bulletin 

 No. 102, from which a few points are here abstracted. 



Teosinte probably produces a greater bulk of fodder 

 per acre than any other grass At the Louisiana Experi 

 meut Station it has j lelded the enormous amount of 50 

 tons of green forage per acre this crop was sold in the 

 field to dairymen for $2 50 a ton The plant grows 8-12 

 ft. high anrt tillers freelj sending up 20-50 stalks from 

 the same root. One hundred stalks from one seed have 

 been recorded. It mav be cut several times during the 

 season, but nearly as good results will be obtained from 

 a single cutting made before there is any 

 frost. The stalks ire tender and there is 

 no waste in the fodder when dry or green 

 One pound of seed to the acre planted m 

 drills 3 ft. apart and thinned to a foot 

 apart in the drill, is recommended Teo 

 sinte is a native of the warmer portions 

 of Mexico and Central America The 

 seed rarely matures north of southern 

 Florida. p Lamson Sckibner 



TEPHEdSIA (Greek, tephtos ash col 

 ored, hoary; referring to the folnge) 

 Lequminbsw. Tephtosta I o /uiiini / is i 

 hardy perennial herb which ar w s 1-2 ft 

 high, has many narrow ish\ „ri\ k vflets 

 and fls. about as large as s\\ eet peas j el 

 lowish white, marked with purple The 

 plant grows in dry sandy soil over a wide 

 range in the U. S. and blossoms in June The 

 are terminal and may contain a dozen fls. each }i-% m 

 across. This species is offered by collectors of native 

 plants. In spite of the large size of the fls., the species 

 is not likely to become a garden favorite, as the colors 

 are not pronounced and the flowers are more or less 

 hidden amid the foliage. In some English works this 

 plant is sometimes rated as half-hardy. 



A much showier species is T, jnacrantJia, a Mexican 

 shrub G-10 ft. high, which bears its large purple and 

 white fls. to the number of 75 in a diffuse panicle about 

 a foot long. It was collected by C. G. Pringle, but it is 

 doubtful whether the plant is in cultivation. It would 

 be a handsome addition to southern shrubberies. 



Tephrosia is a genus of uncertain limits and of small 

 horticultural value. For fuller accounts, see Gray's 

 Manual. B.B. 2:292. B. L. Robinson's revision of the 

 North American species in Bot. Gaz., Sept., 1899, pp. 

 193-202, and Miss Vail's revision of the North American 

 species of Cracca in Bull. Torr. Bot. Club 22:25, 26. 



Virginiina, Pers. Goat's Rue. Catgut. Wild 

 Sweet Pea. Hoakt Pea. Silky-vUlous, erect, 1-2 ft. 

 high: Ifts. 17-29, linear-oblong. June, July. Dry sandy 

 soil. New Eng. to Minn., south to Fla. and Mex. B.B. 

 2:292. — Roots long, slender and very tough. w jj_ 



TEEATOLOGY: thai part of the biological sciences 

 which is concerned with unusual forms of the whole 

 body or any of its organs. These, by comparison with 

 the normal forms, are called malformations or mon- 

 strosities. Malformations among plants are due to a 

 disturbance of the ordinary course of the growth and 

 development of the organs. Such a derangement of 



TERATOLOGY 



function may be looked upon as disease. The mal- 

 formatioE may be occasioned by merely local disease, or 

 it may be a symptom of general disease. Malformations 

 may be brought about («) by the direct influence of 

 external physical conditions; {b} by the act ion or 

 presence of some other organism — plant or animal: (c) 

 by the operation of unknown internal causes. The ex- 

 periniental study of the causes of malformations is 

 yi't ill lis iiit',iiH-y, and in only a few cases can specific 

 explaiiaiions ,,f their origin be given. Having once 

 ociurn-.l. iiiallMiiiiiitions may be inherited and the form, 

 at Hist iiiiusiKil, may be fixed by selection and become 

 characteristic of a race. Thus the cockscomb [Celosia 

 crisfata) shows a hereditary and fixed fasciation; and 

 double flowers are so common as hardly to be esteemed 

 malformations. 



The distinction between malformation and variation 

 is very indefinite. On the one hand, the various forms 

 of root, stem, leaf and flower in cultivated plants are 

 extraordinary as compared with the wild types from 

 which they were derived, but having diverged from the 

 type by relatively small increments they are not looked 



Suddenness of aj pear 

 ance therefore is 

 of the criteiiaof mal 

 formation Even with 

 ? quite 

 impossible to distin 



2480 Extra free pistils of the orange persisting even 



guish between malformation and variation except arbi 

 trarilj When the difference between the ordinary and 

 unusual forms is very marked, and particularly when 

 the alteration gives rise to grotesque forms, having al- 

 tered functions, one speaks of malformation rather than 

 variation. Malformations have been found in all 

 groups of plants, though they are most noticeable in 

 the ferns and flowering plants. A very large number 

 have been recorded; Penzig (see below) has collected 

 data of monstrosities in more than 4,000 species, and 

 the list has been augmented since the publication of 

 his work. Classification of such numerous and diverse 

 phenomena is a most difiicult task and involves an 

 extensive technical terminology. Here only a few of 

 the more important categories can be mentioned. 



1. Alteration in the NtrjiBEK and Size of Organs. 

 1. Pleiomerii is the term applied to the increase in the 

 number of leaf -like organs. The number of members 

 of a whorl may be increased; or the number of whorls; 

 or the number of distributed organs may become 

 greater than usual. Double flowers often show plei- 

 omery. Fig. 2003. Extra free pistils of the orange, 

 persisting even in the fruit, are shown in Fig. 2480. 

 More regular polycarpy appears occasionally in the 

 tomato, and constantly in the "two-story'' apples (St. 

 Valery). It is a fixed race character in the Washington 

 or Navel orange, in which it is associated with seed- 

 lessness. A similar example of polycarpy is shown at 

 Fig. 2481, in which the abnormal growth is an exten- 

 sion of the axis of growth with additional carpels. 



2. Abnormalhj profuse branching of the stem is often 

 produced by a fungous parasite. The branches are 

 usually irregular and more or less faseiate, producing 

 what is called "witch brooms." These are not uncom- 



