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DAVALLIA — Hare’s – foot Fern(Davall’ia ) . Greenhouse Ferns , most of which have fleshy rootstalk that crawl over the open of the grease : the rootstalk are covered with silverish clean or brown hirsute scales . They have finely divided frond which grow directly from the horizontal rhizome and deviate in length from 6 in . to 6 foot . They are aborigine of northerly Africa , tropical and bomber tropical Asia , Malaya , Japan , northern India and Australia , and belong to the Polypody syndicate , Polypodiaceae . Davallia was named in honor of Edmund Davall , a Swiss plant scientist .
They necessitate a compost of adequate parts of peat , loam and leaf mold ; sand should be added to the compost and , in addition , a lowly quantity of humiliated charcoal . The tropical form need a minimum temperature of 55 degrees ; those suitable for a cool nursery necessitate a minimum temperature of 45 degrees . Repotting is done in February for the hothouse kinds and in March for the coolhouse variety . Shallow pans are prefer for those with creeping rootstock . Once the plant life are build repotting is not necessary every year ; a little fresh soil work in between the rhizomes will keep them growing vigorously for several years .
Ferns for hang Baskets . Some form , especially D. bullata , D. Griffithiana , and D. dissecta , are suitable for spring up in hang up basket . The rhizomes are peg down into the basket on the surface of the compost . The soil is keep moist and the rhizomes creep down over the side of the hoop and embrace them with a tidy sum of frond . The rhizomes of D. bullata are check into various shape ; those which are deal by florists will produce frond when moistened and rate in a ardent room or greenhouse .
During the growing time of year Davallias require an copiousness of pee , but very little is required from October to February or March ; the soil must then be let to become quite dry before it is moistened .
Propagation is by air division of the rootstock or rootstock at potting metre . The portions of rootstock are pegged down on the surface of the soil until sufficient root have organise ; they are then potted . Spores may also be sown during give and summer . They are spatter on the surface of finely sieve compost , the pots being place in a saucer of water and handle with glass . The little Ferns are afterwards pricked out , one in aside , in shallow pans , kept in a closed in propagating case and eventually pot severally in 3 - in . pot .
The Chief Kinds . For the warm nursery : D. fejeensis , 11/2 ft . ; D. alpina , 6 in . ; D. dissecta , 6 in . ; D. elegans , 2 ft . ; D. heterophylla , 6 in . ; D. denticulata , 18 in . For the nerveless glasshouse and as house flora : D. bullata ( Squirrel’s - foot Fern ) , 8 in . ; D. canariensis ( Hare’s - foot Fern ) , 18 in . ; and D. Mariesii , 6 in .
DAVIDIA — DoveTree(David’ia ) . This is one of the most interesting of the foliage - losing raw Sir Herbert Beerbohm Tree introduced from central and westerly China during the present century . In a state of nature it get 60 - 70 ft . high , with a widespreading caput , and it promises to attain a large size in favourable parts of North America , where there are already trees between 40 and 50 ft . high which efflorescence and come freely . Davidia is placed by some botanist in the Dogwood house , Cornaceae ; other botanists put it in the Nyssa family , Nyssaceae . The name Davidia was given in honor of the French missioner , Armand David , who collected many botanical specimens in China between 1862 and 1873 .
There is only one species , D. involucrata , but because of diminished differences noticeable in some tree two other names have been applied , D. Vilmoriniana and D. laeta . These are now usually accept as miscellany of D. involucrata . Vilmoriniana is the good form to engraft , for it come along to raise more speedily than the typical D. involucrata . It differ from D. involucrata in that the folio are smooth and not covered with feltlike hairs beneath .
Although dried specimen of Davidia have been useable since 1869 , ejaculate were not received in Europe until 1897 . These were air to France , and of them one germinated in 1899 , that being the shape now called D. Vilmoriniana . About 1900 the late Dr. E. H. Wilson win in sending to Messrs. Veitch in England a large number of seed from which all three shape were grow .
A Remarkable Hardy Tree . Davidia is make out among hardy tree diagram by its heart - shaped , long - stalk leaves , and by its globelike caput of diminished efflorescence being attended by two large , white , leaf-like bracts . The largest bract is 6 in . long and one-half as spacious , the other about two tierce that size . A Sir Herbert Beerbohm Tree in full flower appear as if cover with giant butterflies .
Raising Seedlings . prolific seeds constitute a ready agency of generation . The outer pulp should be remove and the semen sow in a arenaceous stain in a greenhouse or frame as soon as ripe . Germination should then take place in a few weeks . If , however , the seed are allowed to dry before sow they may not germinate for a yr or more . seedling should be keep in a frame until danger of frost is past , and then be planted in a nursery border . When about three years old they should be big enough for their permanent posture . press clipping of half - ripe side shoots contain in later summer can be rout in a close bod .
Choose a sunny shoes with a background of dark - leaved trees for preference , and plant in profoundly fain dirt , well - drained loam being idealistic . The flower time is previous May and early June .
This tree diagram is stalwart in shelter places in the neighbourhood of New York City and in southerly New England . untried specimen are more warm than Old trees and should receive wintertime shelter in the North .
