172 



BOEONIA 



B. Lvs. more than 1 in. long : leaflets in S-6 pairs , 



plus an odd one. 

 eUtior, Bartl. Height about 4 ft. : pubescence va- 

 riable : lvs. close-set, 1-2 in. long, ii-% in. broad, 

 petioled, with Ifts. in 2-6 pairs : Ifts. broader and 

 Bhorter-aouminate than in JB, megastigma : fls. dark 

 red-brown, or rosy red, or purple, sometimes showing 

 groups of widely different colors on the same branch, 

 and borne so densely as to 

 hide one side of the branch. 

 B.M. 6285. Gn. 10:39. P.E. 

 9:491. 



AA. Stigmas small. 



pinn&ta, Smith. Lfts. in 

 2-4 pairs, very smooth, 

 acute : peduncles dichoto- 

 mous, 5-7-fld. : stamens 8. 

 B.M. 1763. L.B.C. 5:473. 



tetr&ndra, Labill. Lfts. in 

 4-5 pairs, obtuse, glabrous: 

 branches pilose : pedicels 

 short, 1-fld. : stamens 4. 

 W. M. 



BOSTON FEBN. See 



Nephrolepis. 



BOTANY. The science 

 which treats of plants ; plant- 

 knowledge. In its widest 

 sense, and properly, it in- 

 cludes much that, by com- 

 mon consent, is usually in- 

 cluded in horticulture,— as 

 amelioration of plants by 

 domestication, hybridizing, 

 and the like. 



BOTBtCHIUM (Greek, in 

 allusion to the grape-like 

 sporangia). OphioglossAceoe. 

 Native Perns of woods and 

 pastures, with fleshy roots, 

 broad temate lvs., and 

 sporangia borne in a pani- 

 cle, which branches from the 

 common st. Grown in the 

 hardy border, or against a 

 building on the shady side. 

 They require no special 

 treatment, and are little cul- 

 tivated. 



A. Jjf. ample, sessile near 



the middle of the stem. 



Virgini^nuni, Swz. Moosr- 



woBT. Six in. to 2 ft. high, 



with a broad, triangular leaf, 



with 3 main tri-quadri-pin- 



natifid divisions : sporophyll 



long-stalked. Eastern U. S. 



—The only species which is 



large enough to make a display. 



AA. Iff. stalked from near the base of the com- 

 mon stem. 



obllquum, Muhl. Fig. 248. Plant, 6-15 in. high, with a 

 ternate If. 2-6 in. wide : segments obliquely ovate or ob- 

 long, %-%iTi. long : sporophyll long-stalked. (B. ter- 

 natum, Authors, not Swz., which is a very different 

 Japanese species.) Eastern U. S. 



dlss6ctum, Spreng. Plant, 6-18 in. high, with a temate, 

 finely dissected If., 3-8 in. wide, the ultimate divisions 

 •fj in. or less wide. Eastern U. S.— Evergreen; delicate 

 and graceful. Grows in woods. l. M. Undebwood. 



BOTTLE-BETJSH. See Metrosideros. 



BOTTOM HEAT. Said of soil temperature which is 

 higher tlian that of the superincumbent air. Most ten- 

 der plants require to have the roots warmer than the 

 tops, particularly when grown under glass. 



Botrychium obliquum. 

 (XK.) 



BOUGAlNVILLJiA 



BOUGAINVlLLiEA (De Bougainville, 1729-1811, a 

 French navigator). Nyctagin&eeai. A half dozen or 

 more species of S. American shrubs, with alternate 

 petiolate entire lvs. The fls. are small and inconspicu- 

 ous, tubular, the margin 5-6-lobed ; stamens 7-8, on 

 unequal capillary filaments ; ovary stipitate. Fls. in 3's, 

 each one subtended by a very large colored bract. These 

 bracts are very gaudy, and constitute the decorative 

 value of the plants. Two more or less scandent species 

 are chiefly known in cultivation. Bougainvilleas are 

 just now receiving much attention in this country. 



glabra, Choisy. Fig. 249. Growing 10-16 ft. high and 

 wide, when planted in the ground and allowed to have 

 its way ; glabrous : lvs. ovate and acuminate, glabrous 

 and bright green : bracts cordate-ovate, bright rosy red, 

 distinctly veined. Brazil. G.C. III. 23: 168. Gn. 54,p. 

 257. B.H. 1889:276. A. G. 16: 15. A.F. 11:137. F.B. 

 10: 106.— Free-flowering and handsome ; often grown in 

 pots and kept dwarf. Var. Sanderid.na, Hort. Very flo- 

 riferous, blooming even in very small pots : bracts deeper 

 colored. Gn. 45:962. A.F. 10: 307 ; 11: 977; 12:1185. 

 Gng. 4:281 ; 5: 345.— A very worthy plant. 



speetdbiliB, Willd. (B. speciisa, Lindl. B. spUndens, 

 Hort. ) . Taller and stricter, with larger and thicker lvs., 

 hairy : fls. in large panicles ; bracts larger, deep rose 

 color, but varying to purple and greenish. Brazil. B.M. 

 4810,4811. P.M. 12:51. I. H. 42: 30. -Variable ; known 

 also as B. Brasiliensis , B. bracteata and B. Peruviana. 

 Var. lateritia, Lem. {B. laterltia, Hort.), has brick-red 

 bracts. I.H. 14: 466. More showy than the last when in 

 full bloom, but more difficult to grow, and, therefore, 

 not so desirable. Int. to cult, earlier than B. glabra. 



reStilgens, Bull. Lvs. pubescent : racemes long and 

 drooping, and bracts purple. Brazil. —Perhaps a form 

 of -B. spectabilis. jj g; -q 



There is much confusion in species and varieties of 

 Bougainvilleas in the trade. They seem to vary consid- 

 erably. B. spectabilis and its varieties seem to be un- 

 promising. Our experience with thousands of plants of 

 B, glabra and var. Sanderiana leads us to say that we 

 cannot think of any class of plants so readily handled. 



249. Bougainvillaea glabra (X K). 



They are easily propagated, are not particular as to soil 

 or treatment, their growth is strong and rapid, they can 

 be flowered with ease and certainty, and they are but 

 little subject to insect attacks. Their flowering charac- 

 ter is so persistent that a small stock of plants will afford 



