Arrangements of vegetable tissues and organs, analyses of natural orders, and other tables : for the use of students of botany.

Date:
1846
Catalogue details

Licence: Public Domain Mark

Credit: Arrangements of vegetable tissues and organs, analyses of natural orders, and other tables : for the use of students of botany. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    II. Fibro--Vascular Tissue, composed of tubes which are marked by fibres or dots. a. True Fibro-Vascular Tissue, composed of tubes, with complete fibres inside. 1. Spiral Vessels (Tracheae, Trachenchyma), having a perfect spiral fibre coiled up in their interior. 2. Annular Vessels or Ducts, having a fibre in the form ofa ring. 3. Moniliform Vessels or Ducts, exhibiting successive contractions and dilatations, and having a perfect fibre inside. b. Spurious Fibro-Vascular Tissue, composed of tubes marked by dots or lines, but without a complete fibre inside. 4. Scalariform Vessels, having their walls marked by bars in the form of a ladder. 5. Reticulated, having their walls marked by reticulated fibres. 6. Porous Vessels (Continuous Bothrenchyma or Taphrenchyma), hav- ing their walls marked by pits or depressions. 7. Dotted Vessels (Glandular Woody Tissue), having opaque spots on their walls, surrounded by circular disks. III.—Different Forms of Inflorescence or Anthotaxis. A. Flowers Sessile. I. Floral Axis elongated. 1. Axis permanent. Spike (Plantago), Locusta or Spikelet (Lolium), Spadix (Arum), Cone (Fir), Strobilus (Hop.) 2. Axis deciduous. Catkin or Amentum (Willow), Compound Catkin (Male flowers of Fir.) II. Floral Axis shortened or depressed (a Receptacle.) Capitulum or Anthodium (Dandelion.) B. Flowers Pedicellate. I. Floral Axis elongated. 1. Peduncles simple. a. of equal or nearly equal length. Raceme (Currant, Hyacinth.) b. lowermost longest. Centripetal expansion—Corymb (Ornithogalum.) Centrifugal expansion—Fascicle (Pink.) 2. Peduncles branched. Panicle (Poa), Thyrsus (Lilac), Anthela (Luzula), Compound Raceme (Plane-tree), Compound Corymb (Milfoil.) II. Floral Axis shortened or depressed. 1. Expansion centripetal. a. Peduncles very short, Flowers forming a close head. Glomerulus (Armeria, Echinops.) b. Peduncles nearly equal, radiating from a common centre. Peduncles simple—Simple Umbel (Astrantia, Ramsons.) Peduncles branched—Compound Umbel (Hemlock.) 2. Expansion centrifugal. a. Peduncles simple—Verticillaster (Lamium.) b. Peduncles branched—Cyme (Elder.)