June 15, 1912. 



THE GARDENERS' MAGAZINE. 



453 



uretty white; atrorubeiis, with fine-sized, 

 msy-purple blossoms, borne above thick 

 clusters of the silvery leaves ; grandiflora, a 

 larger and very pretty edition of the type ; 

 and rosea, a fine rasy-pink, with the colour 



deepening at the centre. 



p nivalis is a good white, with a neat, 

 close habit, and is deserving of note. Other 

 fine whites are P. alba, a continuous 

 flowerer with fine divisions to the leaves ; 

 P alchemilloides, a very distinct subject; 

 p" Clusiana, with downy leaves and ter- 

 minal corymbs of white ; P. davurica alba, 

 a white variety of the little-grown yellow- 

 flowered P. davurica; P. rupestris, a first- 

 rate early-flowering gem, wdiich is decidedly 

 worthy of note; P. splendens, a finer, 

 bolder form than P. alba; and the pretty 

 P. tridentata, which is notable for its 

 tliick masses of foliage and its freedom. 



Of other colours, the yellows claim a 

 large proportion of the species, these 

 necessarily include the silky -leaved P. vil- 

 losa; the palmate-leaved P. recta; P. 

 nevadensis, a very pretty dwarf species; 

 P. montenegrina, from the mountains of 

 Montenegro; P.'opaca, which, though a 

 native species, is worth growing for its in- 

 terest and charm. P.Kotschyana, too, large, 

 except where plenty of space can be given ; 

 P. alpestris, and its finer form pyrenaica, 

 both very pleasing; P. aurea, a splendid, 

 attractive, high mounta'n form; P. arguta, 

 a pale yellow, and the silvery-leaved P. 

 argentea. 



I may also note the orange-hued Hima- 

 layan P. fulgens; P. atrosanguinea, a fine 

 crimson variety of P. argyrophylla ; P. val- 

 deria, a fine silver, with creamy blossoms; 

 the shrubby native species P. fruticosa, and 

 its miniature form humilis ; and the fine 

 Xorth American P. Thurberi, which gives a 

 wealth of brown-red blossoms. 



Many others might be included, but the 

 foregoing list will suffice for all but the 

 keenest collectors, giving ample material 



for selection. 



Potentillas plant out most satisfactorily in 

 autimm and early vspring, and one has so 

 few losses that propagation need not be 

 resorted to unless one has an extension of 

 planting in v'ew. 



With the hybrid varieties of garden 

 origin, one can also use the potentillas for 

 garden planting, where they are distinctly 

 pleasing when w^ell grown, but the wealth 

 of more attractive herbaceous subjects effec- 

 tively preclude them from ever gaining a 

 front rank position for border decoration, 

 though I may say that an edging of P. 

 nepalensis or P. Miss Willmott can be effec- 

 tively used as a foreground to taller sub- 

 jects, as these potentillas certainly gain in 

 effect when planted in number, and 

 edgiuig well kept is very pleasing. 



an 



H 



Crossandra undulsef olia.— Some 



good examples of this uncommon yet pretty 

 Acaiithad were noted in one of the g^roiips 

 at the International Exhibition. Like many 

 of the aphelandras, eranthemums, and other 

 plants of the same order, it is of an upright 

 sparsely branching habit of growth, the 

 pointed oblong-shaped leaves l>eing much 

 waved at the edges, hence its specific name. 

 Tlio flowers, which are borne in compact 

 spikes, are of a rich orange-salmon colour, 

 a very pleasing tint. The individual blooms 

 do not last long, but a succession is kept up 

 from one head for a considerable time. It 

 IS of easy culture if potted in ordinary com- 

 post and given the temperature of an in- 

 termediate house; as in a stove, it is apt to 

 run np tall and weak. This Cros^jandra is a 

 native of the East Indies, and was first dis- 

 tributed by the late Mr. William Bull, of 

 Chelsea, in 1881, under the name of Cro=- 

 Sandra infundibuliformis. At present this 

 crosaandra is not nearly so popular as it de- 

 serves to be.— S.W. 



HORTICULTURAL 

 EDUCATION IN AMERICA- 



(Concluded from p. 435.) 



Greenhouse Construction.— Finest term. 

 Two hours. Pre-requisiite course in Draw- 



The development of the niicdern green- 



ing 



and 



house; types of houses, materials, 

 methods ol construction, installation of heat- 

 ing systems, ete. Laboratory practice in 



hybridisf- ng ; study of 



garden flowers; 

 varieties. 



Greenhouse and Garden Practice 

 Throughout the year. One to three hours. 

 Designed to give the student practical know- 

 ledge of greenhouse work. Lectures and 

 exercises in greenhouse management, pro- 

 pagation, composting soils, potting, water- 

 ing, etc. 



Conservatory Plants. — Second term. Two 

 hours. Pre-requisite preceding course. Stu- 

 dents are advised to take Greenhouse Con- 



1 rii - It 



J 



-■ -- 



J 



r 



CM. 272 



SWEFT TEA DOliBU: S LAVEXDEK GEORGE HERBERT. 



OiK. Of the be^t of lavender-coloured varieties. A.M R.H.S., June 4. Messm. 



Co., h-dinburgh. 



Dobbie and 



erecting section of cypress and iron-trame 

 houses, and in phanning and ^tWmg the 

 cost of commercial ranges. Tlie clas^ will 

 participate in a required excursion. 



Investiigatio-n in Floriculture.— Tliroughout 

 the year. One, two, or three hours a term 

 Pi^e-requisite seoond course in (^ommercial 

 Floriculture ffiven above, and Garden 



Designed 



given 



Flowers; permission - „ , , 

 primarilv for upper-class men and graduate 

 studentvs'. The investigation of problems m 

 the growing of cut floAVers, exotica, and 



struction l>efore entering this course A 

 study of the culture and uses of tropical and 

 sub-tropical plants grown in conservatories, 

 including palms, ferns, begonias, orchids, 



Floral Design.— First term. One hour. 

 \ study of the ])rinciples .if Hur;il art. Prac- 

 tice in tlie arrati^cnicut flowers in de- 



and l.ou(|iH>t>. baskets, table decora- 

 tions interior deroration, etc, 



KU'inentarv Vegetable-Growing. Second 

 term. Three hours. Open to those who have 



signs 



