1908} 
BRIEFER ARTICLES 
223 
The epidermis may readily be stripped in large pieces from the majority 
of greenhouse plants, notably from Chrysanthemum frutescens, Cyclamen 
latijolium, Pelargonium zonale, Helianthus annuus, Tulipa, Vicia Faba, 
and Tradescantia zebrina. 
It can be removed, though with difficulty, from 
some others, such as Abutilon, Cestrum elegans, and Coleus Blumei, while 
im some, e. g., Ficus elastica and Hedera Helix, it can be removed only by 
tangential sectioning with a razor. 
STOMATA-QUANTITIES IN GREENHOUSE PLANTS 
NUMBER SIZE 
Minimum, mean, maximum in |“ Tength and breadth in microns 
Upper surface | Lower surface 
Upper surface | Lower surface Guard pei Guard me 
closed | °P€? 
Abutilon : 6 
ps eee re) 198-333-484 fe) Oo |17X15) 6X 3 
ies BMPR ces SiS 13-25-39 13—- 23-30 |64X32/\31X 7|70X36/38X 8 
rok cia MOCemea. os ° 40- 5 ° o |42X29\21X 8 
ee eeeats.......%. ° 92-146-224 ° Oo |34X%25)14X 
Gi Tysanthemum frutescens| 4-15-35 22— 34- 61 |57X 31/31 X11/58X 31/33 XT 
Coemmeriienta.... ° 30- 55- 88| 0 © |40X27/25X 8 
Cu eres... ° O§-14I-211| 0 o |24XIQ/IOX 5 
yt aa oe ee 6-28-68 | 175-269-368 |21X14| 5X 2/20X16) 6X 3 
Stig n latifolium,.... . ° 2 aR ° o |45X33|21X 7 
ee pulcherrima. ° 76-233-365 ° fo) X19g|11 oa 
: m esculentum...) 17-45-66 | 127-152-184 |27X20|10X 5|27X21|12X 
sag ~ curtotea he ee f = Phe he : ° o |40X36)19X 6 
teil saa Beever ec: ° 228-282-365 | 0 Oar 17| SK 3 
Bei ot... ° 52-I2I-193| 0 o |39X2819X 7 
rT peae ee ° 23-158-193 fo) o |29X26\11X 
“sharia rsttees 52-85-118 156-268 /a3Xar118X B02 ine 
: mM peruvianu 6 Oo |21X17| 9 
Impatiens Sultani..... a ; oie Ss : o |26X18) 9X 
persicum esculentum 12-8 130-202 |27X20)10X §/33X 23/13 X 
Pans “hag ey Cer aaa ete 7 hl re Si , ° 28X21 oe 4 
onium domesticum.| 3-1 Q— 88 |\47X34\23X 8)45X32/24X 9 
Pigeon ltatum... . sec 7 33 48 |40X31/20X 6\45X30/22X 7 
Ph cage zonale ..... 8-22-39 | 83-118-171 |37X 26/16 9|37X25 19X12 
oe eee... c. 13-40-96 | 184-281-356 |25X14| 8X 3\21X13| 7X 
Primula obconica Ae ree : ° 47- 70 o |39X34/17X 
Ricj een ° 22—- 31- 48; o 59X46/30X 9 
Salvia inven rete 39-64-96 | 140-176-224 |30X16) 8X 4 sox 16 ge 
og ~sheteicayg OIE eee -26 oT. 3 20X1 
Senecio mikanioides .. |. ; pe rye ° o |30X24/10X 7 
Tea ees... ° 66-106-149 o |44X32/23X 10 
Thien zebrina..... ° 8— 14- 22 ° ° 55X33 31 X12 
arte. ee 22-33-44 8- 14- 26 |79X37/40X 7/84X35/38X 7 
eee Majus Cipire gta 3 92-130-171 ° o. [27% 12X 
icia Fae” Se ae 22-40-57 | 35- 47- 66 |56X3 te Nee ous 
Vie; ee eee — 52- 70 |44X 27/19 
gt ene equina.... ||” 17-34-52 aoe 48- 61 \42X26|18X 8\43X 28/19 X 
“En 52- 68- 88 |47X36\19X 4/45 X 36/19 X 
Lac... lee 
