PSI 



[671] 



PSY 



P. Ara'ca (Araca). 4. May, Brazil. 1820. 



euroma'ticum (aromatic). 5. Guiana. 1779. 



Cattleya'num. (Catley's). 10. May. S. Amer. 



1818. 



Chine'nse (Chinese). May. China. 1828. 



1'ndicum (Indian). 12. June. E. Ind. 1824. 



monta'num (mountain). 60. Jamaica. 1779. 



myrtifo 1 Hum (myrtle-leaved). 6. April. 1820. 



ni'grum (black-fruited). May. China. 



oligospe'rmum (few-seeded). 10. 1817- 



polyca'rpon (many-fruited). 3. May. Trini- 

 dad. 1810. 



pomi'forum (apple-bearing). 10. June. W. 



Ind. 1692. 



sapidi'sftimum (most-savoury). 10. June. 



1824. 



pu'milum (dwarf). 2. May. E. Ind. 1824. 



pyri'ferum (pear-bearing). 10. June. W. Ind. 



1656. 



ru'brum (red- fruited}. May. China. 1820. 



PSILA. See CARROT MAGGOT. 



PSOEA'LEA. (From psoraleos, warted ; 

 the appearance of some of the species. 

 Nat. ord., Leyuminous Plants [Fabacese]. 

 Linn., 17-Diadelphia k-Decandria. Allied 

 to Amorpha.) 



Herbaceous, by division, as fresh growth com- 

 mences ; shrubs, by cuttings of the half-ripened 

 shoots in April or May, in sand, under a glass ; 

 sandy peat, and sandy, fibryloam. Winter temp, 

 for these, 40 to 48. Glandulo'sa has stood in 

 the open air for a number of years near London. 

 There are some annuals and biennials, but not 

 worth cultivating. 



HARDY HERBACEOUS. 



P. lupineflla (small lupin). 2, Purple. June. 

 Carolina. 1812. 



macrosta'chya (long - spiked). 3. Purple. 



July. California. 1833. 



onolry'chis (gaintfoin-like). 3. Purple. Au- 



gust. N. Amer. 1818. 



orbicula'ris (round- leaved). . Purple. June. 



California. 1835. 



GREENHOUSE EVERGREEN SHRUBS. 

 P. aphy'lla (leafless). 2. Blue. June. Cape of 

 Good Hope. 1790. 



arbo'rea (tree). 6. Bluish. May. Cape of 



Good Hope. 1814. 



Muti'sii (Mutis's), Purple. July. Mexico. 



1828. 



odorati'ssima (most-fragrant). 6. Pale blue. 



June. Cape of Good Hope. 1725. 



Palesti'na (Palestine). 2. Violet. June. Le- 



vant. 1771. Herbaceous. 



pinna'ta (leafleted). 6. Blue. June. Cape 



of Good Hope. 1690. 



pube'scens (downy). 2. Pale blue. August. 



Lima. 1825. 



ripens (creeping). 1. Blue. July. Cape 



of Good Hope. 1774. 



seri'cea (silky). 3. Violet. September. Cape 



of Good Hope. 1815. 



spica'ta (long -spiked). 4. Blue. April. Cape 



of Good Hope. 1774. 



sta'chydis (stachys-teawd). 3. Brown. April. 



Cape of Good Hope. 1793. 



stria' ta (channelled). 3. Blue. May. Cape 



of Good Hope. 1816. 



tenuifo'lia (fine-leaved). 2. White, blue. 



June. Cape of Good Hope. 1793. 



tomento'sa (woolly). 3. Blue. June. Cape 



of Good Hope. 1820. 



P. verruco'sa (warted). 3. Blue. July. Cape 



of Good Hope. 1774. 

 interme'dia (intermediate). 3. Blue. 



June. Cape of Good Hope. 1820. 



PSYLLA. The Chermes is allied to the 

 Aphis. P. pyri, Pear Chermes, appears 

 in May, not unlike a large Aphis, crim- 

 son-coloured, shaded with black. Mr. 

 Kollar says, when pairing is over, the 

 female lays her eggs in great numbers, 

 near each other, on the young leaves and 

 blossoms, or on the newly-formed fruit 

 and shoots. They are of a longish shape, 

 and yellow ; and without a magnifying 

 glass, they resemble the pollen of flowers. 

 They are called either nymphs or larvse 

 in this state, according to the extent 

 of their development; and, like their 

 parents, have their mouth in the breast. 

 After a few days, they change their skins, 

 and become darker, and somewhat red- 

 dish on the breast, and rather resemble 

 bugs than plant-lice, having the extreme 

 point of the body somewhat broad, and 

 beset with bristles. After changing their 

 skins, they quit the leaves, blossoms, 

 and fruit, and proceed more downwards 

 to the bearing wood and the shoots of 

 last year, on which they fix themselves 

 securely, one after the other, in rows, 

 and remain there till their last trans- 

 formation. 



When the nymphs have moulted for 

 the last time, and have attained their 

 full size, the body swells out by degrees, 

 and becomes cylindrical. They then 

 leave their associates, and before they 

 lay aside their nymph-like covering, they 

 search out a leaf to which they fasten 

 themselves firmly, and appear as if they 

 were lifeless. After a few minutes, the 

 skin splits on the upper part of the 

 covering, and a winged insect proceeds 

 from it. It is of a pleasant green colour, 

 with red eyes and snow-white wings. It 

 very much resembles its parents in spring, 

 even in the colour. After a few days, 

 this Chermes has assumed the colours 

 of the perfect insect; the head, collar, 

 and thorax are of an orange colour, and 

 only the abdomen retains its green hue. 

 It now flies away from the place of its 

 birth to enjoy the open air. 



P. mali (Apple Chermes). This, ac- 

 cording to the same author, appears in 

 June. In September, they pair, and lay 

 their eggs, which are white, and pointed 

 at both ends, a line and a half long, and 

 the fourth of a line thick, and become 



