Zea mays

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3.29 1/-(" 3.30 3.30 Clustered inflorescences of the dicotyledon E.llphorbia cyparis$jas. E.lch 'flower' is actually a small inflorescence with a pair of br:J.cts (1) at irs base. A single cup-shaped bract bears four ydlow ncetarics (2) and in the centre lies a prominent ovary (3) terminated by three st)·Ie5. This represenrs the solitary female flower which lacks a periamh. At the base of the pedi\;e1 (4), which bears the female flower, lie the male flowers (5) with each represented by a single stamen. 70 • 2 3.29 LS of the young stem of the dicotyledon Unllm I/sitatissiml/m (flax) showing intrusive fibrt:S. The thin-walled fibres (I) are growing between adjacent chloren· chrma cells (2). Flax fibres arc generallr unlignified and the multinuclear.. prOtO· plasts arc pcrsistem. At maturity Ih.. fibres arc extremely thick-walled (d., 2.7) and may be extr:J.cted to produce linen. {G·Ds, LM x 285.) 1 Fibre 2 Chlorench)'ma cells 1 Bracts 2 Ne'Ctarics 3 Ovar... 4 I'cdicel 5 Male flowers -
3.31 TS of n cortienl mucil:lge duct in the acrinl root of the monocotyledon Philodendro" saggitifolillm. These oo:;cur in the p:lrenchymatous cortex (I, d., 3.4) and each consistS of a narrow central duct (2) surrounded by a single layer of secrc[Ory cells (3). The mucilage duet is itself enclosed witbing severnl layers of fibres (4). (lM x 550.) I Parenchymatous conex 2 CcnlTal duci 3 Secretory cells 4 Fibres 3.32 leaf of the dicotyledon AJebemilfa showing guttation. Water is excreted from numerous hydathodes (modified StOmata) located at the leaf matgins. Cunarion may be a meo;:hanism to prola:t the intercellular space sySlem of Ihe leaf from beeoming waterlogged in conditions of excessive root pressure. (Copyright of T. Norman Tail.) 3.33 XeroJllorphic shoot system of the dicotyledon E"/Jhorbia canadensis with its leaves reduced to spines. The stem contains an elaborate lariciferous system and rhe wounded stem has exuded latex (1) which is congealing on to the volcanic rock on which the bush is growing. I LatcX 3.33 71 3.31 3.32
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A Colour Atlas of PLA T STRUCTURE B
Page 4:
5 The green leaf 97 Introduction 97
Page 7 and 8:
• CHAPTER 1 Introduction The asso
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1.6 1.6 L}'copusicon e$culentum (to
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1.17 1.19 ,--------------::c-=-----
Page 17: 1.22 1.22 Group of rail Cordy/hIe a
Page 22: 1.32 B 24 1 6 \ -H-r 14 13 c 11 """
Page 25 and 26: times becomes highly lobed (2.15, 2
Page 27 and 28: stack (2.14, 2.52) of smooth cister
Page 34: 2.14 2.14 Diagram of the fine-struc
Page 43: 2.39 Longitudinally-sl:crionl:d l:h
Page 55: CHAPTER 3 Plant histology Disttibut
Page 60: 3.1 3.2 3.1 TS of the: petrified st
Page 66: 3.21 ,-------------, 3.23 3.2J Non-
Page 72: 3.41 -+-2 3.39 L$ of the phloem of
Page 78: 3.58 80 3.56 3.56 TS of tbe seconda
Page 83 and 84: absent or may develop some distance
Page 85: 4.2 4.3 r-----;; 4.2 RLS of the ext
Page 91: 4.24 4.24 TS of a vascular bundle f
Page 97 and 98: secretion may temporarily accumulat
Page 99: 5.3 ,--------------, 5.3 Large fan-
Page 112 and 113: 5.45 5.44 IS of the petiole of the
Page 114 and 115: 5.50 116 5.50 Base of the mature tr
Page 116 and 117: fibres often develop in the outer p
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6.7 6.7 5hool of the monocotyledon
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6.33 6.32 TS showing distribution o
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7.4 I'neumatophores of Alliceimia n
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7.14 l.S of a later:J.1 root primor
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7.26 7.26 Fine rOOfS from a large t
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pappus (calyx, 8.9) of each floret
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tube frequently corers the embryo s
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S.19 TS of imm,lIure pollen sacs in
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8.25 8.25 Mature pollen grain of th
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8.64 hnmarure fruir of rhe dleot)·
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a tetraploid h3.S a double: set. Po
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Vacuole An organelle bounded by rhe
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Cell (continued) meiosis 158, 161,
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Sanicula europea (sanicle) 68 Sanse
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