1460 



PSEUDOTSUGA 



P, Japonica, Beissn. (Tsuga Japouica, Shirass.). Tree, to 60 

 ft., similar to P. Douglasi, but Ivs. shorter arid broader and 

 cones smaller, with strongly retiexed bracts. Japan. But re- 

 cently introduced, and hardiness not yet proved ; probably as 

 hardy as the hardier forms of P. Douglasi. P, macrocdrpa, 

 Mayr (P. Douglasi, var. macrocurpa, Engelm.). Tree, to 60 or 

 80 ft., with remote and usually pendulous branches : Ivs. acute, 

 bluish gray: cones 4-6% in. long, with shorter bracts; seeds % 

 in. long. S. Calif. S.S. 12:608. G.F. 10:25. Seems not yet in- 

 troduced; not hardy north, and inferior. P. Davidiana, Bertr. 

 ^Keteleeria Davidiana, Beissn., and P. Jezoensis, Bertr.=Kete- 

 leeria Fortune!, Carr. Keteleeria certainly constitutes a dis- 

 tinct genus and cannot be united with either Abies, Picea, 

 Tsuga or Pseudotsuga. It is chiefly distinguished by the stami- 

 nate fls. being arranged in clusters like those of Pseudolarix, 

 but are only short - stalked : cones upright, with persistent 

 scales; bracts enclosed, half as long as the scales: Ivs. similar 

 to those of Abies but pale green, not whitish beneath, pointed 

 or obtuse, rigid. In old age the head becomes broad and flat- 

 topped as in Cedrus Libani, in young trees it is regular, pyra- 

 midal, with whorled branches. The germination is very differ- 

 ent from that of most other conifers, but similar to Ginkgo 

 and Araucaria, as the two cotyledons remain in the ground in- 

 closed in the seed and do not become green. None of the 3 or 4 

 Chinese species seems to be in cultivation in this country, 

 where they would probably not be hardy north of the middle 

 states, but P. (Keteleeria) Fortune!, Carr., has been successfully 

 cult, in S. Europe. The Ivs. of this species are about 1 in. long, 

 rigid, pointed on the lower branches, obtuse on the upper ones: 

 cone 3-6 in. long. F.S.7,p. 223 (as P. Jezoensis). R.H. 1866:451. 

 Prop, by seeds, layers and cuttings and by grafting on Abies 

 Picea; it will probably also grow grafted on Pseudotsuga. 



ALFRED REHDER. 



The Douglas Spruce is a tree for the million. It 

 would be difficult to overrate its beauty. As a forest 

 tree it perhaps produces a greater crop of lumber per acre 

 than any other species. It probably grows faster than any 

 other conifer. Indeed, the complaint is sometimes 

 made that it grows too fast to make a compact lawn 

 tree. It is desirable to have groups of Douglas Spruce, 

 because the foliage is so soft that single specimens are 

 sometimes injured by high winds. Specimens planted 

 on the prairies without protection from hot winds may 

 sometimes have their buds injured by late spring frosts. 

 It is, of course, a mistake to use the Douglas Spruce 

 for a wind-break. The Douglas Spruce is generally 

 prop, by seeds. Seeds of conifers gathered on the 

 Pacific slope are tender, while those gathered in Colorado 

 produce hardy trees which endure both drought and 

 cold. Unlike the firs, the Douglas Spruce has fine, fibrous 

 roots like the Norway Spruce and transplants as readily. 

 The writer has transplanted many stocky young trees 

 growing in the open to the nursery and has saved 90 per 

 cent of them. They seemed to thrive as well as nur- 

 sery-grown Norway spruces of the same size. The 

 yield of seed from a wagon-load of cones is light, and it 

 is somewhat difficult to grow seedlings. In some cir- 

 cumstances it will be cheaper in the end to procure 

 young trees. The Douglas Spnice is remarkable for its 

 wide variation in form and color. The needles may be 

 short or long, light green, dark green, or have a bluish 

 or silvery cast. The deep blue and silvery foliage is 

 characteristic of the deep gorges of high altitudes. 



C. S. HARRISON. 



We have found the Douglas Spruce one of the easiest 

 of all conifers to grow from seed. However, the seed 

 rapidly loses its germinating powers, in this respect 

 partaking of the firs more than of the spruces. As it is 

 now being grown and disseminated, it is not to be 

 recommended for general planting. Seed from trees 

 growing in the valleys and foothills of Colorado will not 

 produce trees that are hardy north of the Ohio river. 

 As trees growing in those localities are easy of access, a 

 larger part of the seed is collected from them. There is 

 considerable difference between trees grown from valley 

 and mountain seeds. The former have short green 

 leaves and a stunted look, compact growth, showing 

 none of the bold and striking effect of those from a 

 high elevation. The latter have longer leaves, more 

 glaucous appearance and great rapidity of growth. The 

 valley trees brown in winter; the mountain trees do 

 not. Many of the latter have a spreading and weeping 

 habit, partaking more of the characteristic of the hem- 

 lock. The valley trees have more of the habit of Picea 

 orientalis, but not as good color. Unless more care is 

 taken in collecting seeds of this tree, it will soon fall 



into disrepute. THOS. H. DOUGLAS. 



PSIDIUM 



PSlDIUM (Greek, psidion, the pomegranate), Myr 

 tdcece. About 130 species of evergreen trees and shrubs. 

 Lvs. opposite, petiolate, penniveined: fls. rather large, 

 white, cymose on axillary or lateral, 1-3- (rarely many-) 

 fid. peduncles; calyx 4 5-lobed, the lobes persistent; 

 petals 4 or 5, spreading: berries globose, ovoid or pear- 

 shaped, usually roughish, often crowned with the calyx 

 limb; seeds subreniform, hard. Natives of tropical and 

 subtropical America; some species have become natur- 

 alized in tropical Asia and south Africa. Prop, easily by 

 suckers, cuttings or seeds. 



INDEX 



(s. L. refers to supplementary list.) 



Araca, 2. Guineense, 3. pyriforme, 1. 



Cattleianum, 4. lucidum, 4. sapidissimum, 1. 



Guajava, 1. polycarpum, S. L. ' Sinense, S.L. 



Guava, 1. pomiferum, 1. Thea, s. L. 



Guayavillas, s. L. pyriferum, 1. 



A. Branchlets 4-angled. 



1. Guajava, Linn. (P. pomiferum, Linn. P. Guava, 

 Eaddi). LEMON GUAVA. Fig. 2008. Shrub or small tree, 

 6-15 ft. high : Ivs. oval to oblong-lanceolate, bluntish, 

 chartaceous, glabrous above, puberulent below: pe- 

 duncles 3 to many-fid., pubescent: fr. globose, yellow, 

 aromatic, somewhat astringent. June. Grown in S. 

 Calif, and valued for jellies and preserves: several 

 horticultural varieties are offered by nurserymen. 

 Var. sapidissimum, Jacq., has similar fruit but only 

 1-fld. peduncles. Becomes a troublesome weedy plant 

 in moist tropical countries. 



Var. pyriferum, Linn. (P. pyriferum, Linn. P. py- 

 riforme, Griseb.). COMMON GUAVA. Small tree: Ivs. 

 acute: peduncles 1-fld. : fr. small, pear-shaped, smooth- 

 skinned, yellowish when ripe, aromatic, sweet and 

 pleasant to the taste. Fls. May-July: fr. July-Nov. 

 B.R. 13:1079. The source of the well-known Guava 

 jelly of the West Indies. The fresh fruit makes ex- 

 cellent tarts after removing the small stony seeds. To 

 be eaten raw, it is best gathered in the early morning, 

 according to Lindley, as it is then more agreeably acid. 



A A. Branchlets terete. 



2. Araca, Raddi. BRAZIL GUAVA. Shrub 4-6 ft. high : 

 branchlets hirsute: Ivs. oval or oblong, obtuse, above 

 sub-velutinous to the touch, beneath pubescently sub- 

 hirsute; veins reticulate, somewhat raised: peduncles 

 axillary, 1-3-fld. : fr. ovoid, greenish yellow; flesh 

 white. Dry uplands of Brazil. Offered by two or three 

 dealers, and said to be one of the very best Guavas. 



3. Guine6nse, Swartz. GUIANA GUAVA. Shrub 8-10 ft. 

 high: branchlets pubescent-villous : Ivs. ovate, glabrous 

 above: petioles and under side rusty-tomentose : pe- 

 duncles 1-3-fld.: fr. subrotund, subpubescent, deep 

 yellow outside; flesh red, said to possess an exquisite 

 flavor. 



4. Cattleianum, Sabine. STRAWBERRY GUAVA. Shrub 

 or small tree, 10-20 ft. high : branchlets glabrous : Ivs. 

 opposite, obovate, coriaceous, glabrous, dark green: pe- 

 duncles axillary, opposite, solitary, 1-fld., scarcely equal- 

 ing the petioles: fr. nearly spherical, about 1 in. long, of 

 a fine deep claret color, with a tough foveolate skin, re- 

 sembling that of a ripe fig, but thinner; pulp fleshy, soft 

 and juicy, purplish red next the skin but white at center, 

 sweet and acid, with a strawberry-like fragrance and fla- 

 vor, hence the popular name. May. Brazil. B.R. 622.B.M. 

 2501. N. 3:238. Extensively cultivated in S. Calif.; 

 hardy outdoors near San Francisco and probably north- 

 ward. Var. lucidum (P. lucidum, Hort.). YELLOW 

 STRAWBERRY GUAVA. Has a larger yellow fruit, said to 

 have a better taste than the purple-fruited form. Re- 

 ported as being cultivated extensively in Florida; grown 

 in S. Calif, by Franceschi. 



P. Guayavillas, Hort. "Brazil; a distinct-looking species, 

 said to have smaller fruit than P. Guajava but of superior 

 taste,"= P. Cujavillas] Burm. (?), which has been reduced to a 

 form of P. Guajava. P. polycarpum, Lamb. Small shrub with 

 branchlets terete, hirsute: Ivs. subsessile, ovate-oblong, acute, 

 pubescent above, scabrous and rugose beneath : peduncles 3-fld. : 

 fr. yellow within, edible, considered superior in flavor to the 

 common Guava, but rarely larger than a cherry. S. Amer. and 

 W. Indies. P. Sinense, recently introduced by Mr. Swingle, 

 agricultural explorer for the U. S. Dept. of Agriculture, not yet 



