228 
Light and Darkness 
in Seed Germination 
Seed planting time is here and we want to 
remark on the subject of germinating seeds 
in the light or in darkness. 
By darkness is meant out of the direct 
sunlight with the seeds usually covered or 
placed in a dark part of the room; by light, 
is meant that the seed should be exposed 
to the light but not necessarily to direct 
sunlight, at least for long periods. 
The letters L and D indicate which and 
the letter F following indicates the temperat- 
ure should be above 55 degrees F at night 
and the letter K means a night temperature 
of below 55 degrees; that is cool and warm 
germinating seeds. There are other re- 
The following fiowers indicate that there 
quirements on some seeds such as bottom 
heat, etc.. which will not be mentioned here. 
is some indication that they react to one or 
or the other treatment: 
Petunia, LK. 
Phacelia, DK. 
Mignonette. LK. 
Ricinus or Caster Bean, DK. 
Salpiglossus, LK. 
Marigold, DK. 
Verbena, LK. 
Pansy, DK. 
Viscaria,,LK. 
Cajophora lateritia, LK. 
Cobaea scandens, DK. 
Medeola asparagoides, DK. 
Acanthus latifolius, DK. 
Aconitum napellus, DF. 
Aquilegia, LK. 
Adonis vernalis, LK. 
Bellis, LK. 
Campanula pulilla, LF. . 
Campanula medium, LK. 
Delpinium, DK. 
Dianthus caryphyllus, LK. 
Digitalis, LK. 
Erinus alpinus, LK. 
Eryngium alpinum, LF. 
Gentiana acaulis, DF. 
Geum atrosanguineum, LK. 
Gypsophhila repens, LK. 
Gypsophylla paniculata, DK. 
Helleborus, DK. 
Heuchera, LK. 
Incarvillea delavayi, LK. 
Lunaria biennis, DK. 
Lupinus perennial, LF. | 
Papaver alpinum, LK. 
Physalis franchetti, LF. 
Primula, many species, LF. 
Primula veris acaulis, LF. 
Primula cashmireana, DK. 
Primula denticulata, DK. 
Primula Mioreana, DK. 
Primula auricula, LF. 
Salvia pratensis, LK. 
Saxafraga decipens, LK. 
Sedum spurum coccineum, LK. 
Solidago LK. 
Thalictrum diplerocarpum, LK. 
Trollius europaeus, DF. 
Verbascum, LK. } 
Viola cornuta, 
Asparagus plumosa, DK. 
Begonia hybrids, LK. 
Calceolaria, LK. 
Ficus elastica, LK. 
Impatiens, DK. 3 
Primula chinensis, LK. 
Primula obconica, LK. 
Primula malacoides, LK. 
Sparmannia africana, LK. 
We would be pleased to hear from read- 
ers about their experience in this work. 
‘ leaves. It grows in arid lands from Ore. to Calif 
LK. a 
QUAMOCLIT - RANUNCULUS 
PROTEA. (PROH-tee-ah) Proteaceae. 
Trees, shrubs and stemless perennials from Ss. Af. Those offered will stand severa* 
degrees of frost. They can be grown in pots where they muK«e a grand showing. 
—Abyssinica. From So. Rhodesia... PROT-1. 10 seeds 50¢ 
—angolensis. From So. Rhodesia - .. PROT-2. 10 seeds 50¢ 
—cynaroides. Very dark pink for w il and cool place PROT-3. 40¢ 
—cynarsides. Red and dark pink for cool and moist place PROT-4, 40¢ 
—Melliefera. Very delicate pink; 9 ft bush; cups 5” deep, 3’ ac; HHP.... PROT-7. 35¢ 
PRUNUS (PROON-us) Rosaceae. 
Includes the stone-fruits, Plums, Peaches, Cherry-laurels. 
kinds are especially listed here. 
—avium. Sweet Cherry Lb. $1.10; Oz. 25¢ 
—Lyonii. Island Cherry. Ev. to 30 ft; fis white; Calif 
—Sargentii. Handsome, hardy tree; Japan....Oz. 45¢; lb. $4.50 
PSIDIUM. (SID-ee-um) GUAVA. Myrtaceae. 
Tropical trees and shrubs grown in the far South for ornament and their edible 
fruits, much used in jellies and conserves. Easily grown any where oranges are. 
PSIDIUM Guajava. Common Guava. Grown in Floorida PSID-4. 25¢ 
PTEROCEPHALUS. (tehr-oh-SEFF-al-us) Dipsaceae. 
Draba-like perennials, grown in the rockery. They are native of the Pyrenees; 2-3” 
high; mat-like growth. 
—pyrenarica. Lvs in rosettes; fis lilac; 2-3”; PETOC-1(C). 30¢ 
PURSHIA. (PURSH-e-ah) (Kunzia) ANTELOPE-BUSH. Rosaceae. 
Western native bushes with small yellowish flowers, probably best for its clustered 
PURS-I. 25¢ 
Ornamental flowering 
PRUN-12. 20¢ 
... PRUN-68 (J). 25¢ 
PRUN-108. 25¢ 
—tridentata. Deciduous, to 6 ft; silvery leaves; hardy to Mich 
QUAMOCLIT. (KWAM-ob-klit) STAR GLORY. Convolvulaceae. 
Annual and perennial twining vines, treated as tender annuals in the North. They 
are used mainly for rapid growing climbers, thriving in a good light soil and in full sun. 
——hederifolia. Star Ipomoea; 10 ft; scarlet, yellow th; lvs; HHA QUAM-IH. 20¢ 
—lobata. Crimson fis fading to pale yellow; grows to 20 ft; TP 
—vennata. Cypress Vine. Showy scarlet fis; to 20 ft; TA 
——¥ynite. A pretty white flowered form 
——Pink. A pink colored variety 
——wMixed. Mixed varieties of Q. pennata 
—Sloteri. Cardinal Climber. Red fis, white throat, 2” long to 20 ft; TA 
—Quamoclit Mixture. All species mixed 
ORDERS FOR SEED MAY BE AS LOW AS ONE PACKET; ORDER AS NEEDED. 
RAMONDA. (ray-MOND-ah) Gesneriaceae. 
Small plants making flat rosettes of hairy basal leaves, stems 3-4 inches long bearing: 
several 4-5 pointed flat flowers, resembling Saintpaulia, to which family it belongs. 
Fully hardy with protection; seedlings develope slowly. 
—Nathaliae. [avender-blue with golden center; Serbia; HHP. RAMO-5(C). 50¢ 
—Myconii. Purple fis; 1 in. ac; 3 in; Pyrenees; HHP RAMO-7(C). 50¢ 
—pyrenaica. Reclassified as R. Mmconii, which see. 
RANUNCULUS. (rah-NUN-keu-lus) BUTTERCUP, CROWFOOT. Ranunculaceae. 
A very large genus and popular in flower gardens; those grown mainly as greenhouse 
plants belong to R. asiaticus. They are generally perennial and easily grown from seed, 
in well drained soil and sunny positions. Some of the low growing species are ideal 
rockery plants. 
—californicus. 2 ft; HP; yellow fis; Ore..... 
—aconitifolius. White fis 1 in. ac; 3 ft; HP... 
—hirtellus. Variable-species, fis 2’”’ yellow, wh 
— —Camelia-flowered. 
—Hybrid, French Gianis. 
— —MDMixed Hybridg. ............ 
Lind le yi. ...........:cecceeeeee 
—Lappaceus. 
—Lyallii. Showy; 2 ft; white; N. Zealand; TP 
—superbus. Shades pink, white, red, yellow, rose; 35 d.to germ; HP. 
—Ranunculus Mixture. All mixed 
RAPHIOLEPSIS. (raf-ee-OL-ep-iss) Rosaceae. 
Evergreen shrubs grown in Southern States. They have shining leathery leaves; 
white or pink flowers in racemes or panicles followed by purple fruits. 
—umbellata v. ovata. Yeddo-Hawthorne; to 12 ft; Japan....0z. 70¢ RAPH-6V (J). 35¢ 
RHEUM. (REE-um) RHUBARB. Polygonaceae. 
Perennials with stout basal leaves and with the flowers in clusters or racemes at top of 
long stems. There are many species of which the common Rhubarb is one. Used mainly 
for bold effect in the border. 
—acuminatum. Stems and fis dark purple; 2-3 ft; HP; Himalayas . 25¢ 
—nobile. Densely covered with yellowish bracts; striking; 4 ft; HHP . 25¢ 
—Rhaponticum. Pie Plant. Listed in with the herbs. 
—Rheum Blend. All kinds mixed . 20¢ 
RHODANTHE: see Helipterum Manglesii. 
RHODODENDRON (roh-doh-DEN-dron) Rose-bay, Azalea. Ericaceae. 
—Ghent Hybrids. A high quality hybrid strain 1/16 Oz. $1.50 
—Kaempferi. (Home grown seed (Rhododendron obstusum Kaempferi 
red to pink; .. RHOD-250K. 
—Schlippenbachii. Pink spotted brown;3” ac; frag; Korea; 15 ft.. .. RHOD-228. 
—obtusum Arnoldianum. Hyb. amoenum and Kaempferi; rose, red; RHOD-250A. 
We intend the classifications to be correct, even to the capitalization of the species 
names and will appreciate any corrections. Index will appear in a near fuiure issue. 
Bb means bulb; Tr, tree; Sh, shrub; T, frost tender,; W white; lvs, leaves Cl, climber. 
PIONEER SEED COMPANY DIMONDALE MICHIGAN 
je —— 
