110 



ASPIDISTRA 



blade narrowed into a channeled petiole a third of its 

 length: fls. lurid purple, on short 1-fld. scapes; perianth 

 segments 8 ; stamens 8 ; stigma broadly shield-shaped, 

 like a small mushroom. China. — The variegated form 

 is more commonly grown, the alternation of the green 

 and white stripes being singularly beautiful. No two 

 Ivs. are exactly alike. e. O. Orpet and W. M. 



ASPlDIUM. See Dryopteris ami Poli/stichnni. 



ASPLENfiNDEIUM. See Thamnopteris. 



ASPLfiNIUM (Greek, not the spleen; referring to sup- 

 posed medicinal properties). Polijpodiilcete. A large, 

 widely distributed genus of ferns, containing some 200 

 species. Easily distinguished by the free veins, and by 

 the elongated sori covered by an indusium, which nor- 

 mally is attached to one side of a vein. 



Aspleniums enjoy an abundance of moisture at the 

 roots, but they will turn brown in the winter months in 

 an excessively moist atmosphere. They should be kept 

 in a very lightly shaded position. A good potting ma- 

 terial consists of equal parts of rich soil and leaf -mold or 

 peat. The following are some of the most useful com- 

 mercial kinds : A. Belangeri, height 2Kft.; A. bulbif- 

 erum, 2 ft. ; A. laxum, whi^h grows quickly into a 

 handsome specimen iiboiit 2(i in. hitrh. and seems to 

 stand the hot, ili\ Am. j ir:in ^uinin. i - ii. tter than other 



species; A. .v.j/' < i I /iim, which is 



dwarf, compact . \> : i : ; : i . t i-asily propa- 



gated. For ham;ii:- l.:i-!,- '-, I ' ■ - "'r/zMsbest. The 

 foregoing species ami i.tlu-r?. i.f like lialiit develop small 

 plantlets on the surface and edge of pinnse. As soon as 

 these are sufficiently strong, they may be detached, with 

 a small piece of old pinnie, and pricked into shallow pans, 

 the older part being placed below ground to hold the 

 young plant flnnly in position until roots have formed. 

 The best soil for this purpose is composed of equal parts 

 of fresh garden soil, leaf -mold or fine peat, and sand. Plant 

 very firmly, and place in a shady, moderately moist and 

 close position, where in 10 to 15 days they willmake roots. 

 The foregoing ones do best in a temperature of 50° F. 

 A. cicutarium is easily gro^vn from spores, and is very 

 useful for fern dishes. Nichol N. Bri-ckner. 



Alphabetical list of species described below : A. Adi- 

 antum-nigrum, 14 ; affine, 13 ; angustifolium, 10 ; Bap- 

 tistii, 12; Belangeri. 2ri : hulbifpnini. 18: cicutarium, 20 ; 

 cuneatiiiti , Ti : rhff,.--',/- . "^ : i lu ii.>i')i ^. ): Filix-fcemina, 



25; fw II ' I'. I-,,-:-';- ' : : • ••iiHisum, 9; fra- 



grans. lii, li i i- iihyUum, 19; 



nobili.^. -\ . .:,_., . _' ; parvulum, 7; 



pinnatiliiliiiii.,:; i.:,,i wm_ .m.u. ? , jlii.:-i.!;\ llum.l9; rutffi- 

 folium, 22; salicifoliiini, II; sfrratuni, 1 ; spinulosum, 

 27; thelypteroides,26; Trichomanes, 6 ; viride, 5; vivip- 

 arum, 24. The following are native and hardy : Nos. 

 3, 5, 6, 7, 10, 25, 26. 



A. Sori Hi 



B. Zf. simple, with a serrate margin. 



1. serritum, Linn. Lf. 1-3 ft. long, on a very short 

 stipe, 2—4 in. wide, gradually narrowed below: sori 1 in. 

 or more long. Fla. to Brazil. 



BB. Lf. lobed or pinnaiifid. 



2. Hemionitis, Linn. (A. palmcLtum, Lam.). Lf. 4-6 

 in. each way, hastate, with a triangular terminal lobe and 

 two lateral ones, and a large, rounded sinus at the base: 

 sori often over 1 in. in length. Spain, Canary Islands. 

 S. 1:586. 



3. pinnatifidum, Nutt. Lvs. clustered, from a short 

 rootstock, 3-9 in. long, with mostly rounded lobes at the 

 base and terminating in a slender point ; texture thick, 

 herbaceous ; occasionally rooting at the tip. Pa. to Ala. 



R. Scott. Texture thin : lvs. 5-10 in. 

 long, with a few irregular divisions near the base, and 

 a long, slender, much-incised apical portion, occasionally 

 rooting at the apex. A very rare native species. 



ASPLENIUJI 



BBB. Lvs. once pinnate. 



c. Pinnae less than %in. long, blunt. 



D. Rachises greenish. 



5. viride, Huds. Lvs. 3-8 in. long, scarcely more than 

 Min. wide, with numerous rather distant Ifts., which are 

 ovate and deeply crenate : sori abundant, oblique. A 

 subalpine species of N. Eu. and N. Amer. S. 1:661. 



DD. Bacliises purplish or blackish. 



6. TrichAmanes, Linn. Lvs. densely clustered, 3-8 in. 

 long, 14 in. wide, with densely crowded oval leaflets, 

 which are slightly crenate on the 



upper side and suddenly narrowed 

 at the base. Northern hemis- 

 phere generally. A. G. 1892:653. 

 S. 1 : 653. 



7. p&rvulum, Mart. & Galeotti 

 Leaf 5-9 in. long, with 20-30 pairs 

 of mostly opposite Ifts., which are 

 li-Va in. long, rounded at the 

 outer margin and squarely trun 

 cateatthebase. South- -, 

 em states and Mex. 



CO. Pinna! %-l inch K 



long, with a strong ^ > 

 auricle at the up- ^ 

 per side of the base 

 or deeply incised 

 on the upper mar- 

 gin. 

 8. platynetiron, Oakes 

 (A. ebenfum. Ait.). 

 Lvs. 6-15 in. long, with 

 30-35 pairs of Ifts. 

 which have an enlarged 

 auricle at the upper 

 side at the base, the 

 lower Ifts. reduced to 

 mere triangular auri- 

 cles : sori. when ma- 

 ture, covering the en- 

 tire surface. Canada to 

 S.Amer. A. G. 1892:654. 

 S. 1:535. 



9. formdsum, Willd. 

 Lvs. 12-16 in. long, 

 with numerous alter- 

 nate pinnsB which are mostly deflexed, with the upper 

 margin deeply incised and the lower margin toothed : 

 sori 3-5 to each 1ft. Trop. Amer. 8.1:576. 



ccc. Pinna 3-e in. long, linear or lanceolate. 



10. angUBtiidlium, Michx. Lvs. 18-24 in. long on stout 

 stalks, 4-6 in. wide, with 20-30 pairs of nearly sessile 

 pinncB, which are truncate at the base and extend to a 

 tapering point ; fertile pinnse narrower and more dis- 

 tant. Moist woods northward. S. 1:496. 



11. salicifdlium, Linn. Lvs. 12-18 in. long, with about 

 20 distinctly stalked horizontal pinnte, which are wedge- 

 shaped at the base, and curve upward to a long point : 

 sori strongly oblique to the midrib, wide apart, not 

 reaching either margin or midrib. W. Ind. to Braz. 



BBBB. Lvs. 3-4 pinnate, 

 c. Ultimate divisions tin 

 somewhat fan-shaj 



12. B&ptistii, Moore. Leaf bipinnate, with broadly 

 ovate pinnsB 5 in. or more long, each with about 4 stipi- 

 tate linear toothed pinnules ; sori nearly parallel with 

 the midvein and close to it ; rachises scaly, with pur- 

 plish lined scales. South Sea Islands. 



13. affine, Swz. Leaf 9-18 In. long, with numerous 

 pinnae on either side, the lower ovate deltoid, the upper 

 lanceolate ; pinnules incised : sori linear. Mauritius 

 and Ceylon to E. Ind. 



14. Adi&ntam-nlgTum, Linn. Stalks brownish, lvs. 3- 

 pinnatifid from winged rachises, triangular, 5-9 in. long; 

 ultimate divisions ovate, sharplv incised and serrate on 

 both sides. Old World generally. S. 1: 486. 



159. Asplenium rhizophyllum. 



