Thexar-VII: The-Xa — Sha-El 09: Thal-Vex Khal-El — The Plant Kingdom
"The root does not argue with the soil. The leaf does not argue with the light. A plant is patience made visible. It stands still — and outruns everyone." — From the "Book of Roots," a sacred Xha'Ruun text, the Era of Unity
Ruun-ak rass: → rhu [Thexar-I, Ruun 17, "The Flora of Théxar"], → rhu [Thexar-I, Ruun 11, "Ecology"], → rhu [Thexar-VII, Sha-El 10, "Symbiosis and Coevolution"], → rhu [Thexar-VII, Sha-El 13, "Biosphere Interactions"] Mor-ven: The flora of Théxar rests on chromophyll photosynthesis under the orange spectrum of Khar’Vex, pervasive silicon biomineralization, and sixfold periodicity — six vegetation phases and six annual rings per year. Some 380,000 species are described across five divisions, dominated by Chromophyta. This digest deepens the survey of Ruun 17 with anatomy, physiology, life strategies, evolution, and the plant basis of civilization.
09.1 The Photosynthetic Apparatus
Photosynthetic efficiency of 4.2% comes from a coordinated antenna complex of five pigments.
| Pigment | Color | Absorption peak | Localization in the leaf | Role |
|---|---|---|---|---|
| Chromophyll a | Copper-red | 570 nm | Reaction center | Primary, photosystem I |
| Chromophyll b | Golden | 540 nm | Light-harvesting complexes | Auxiliary, photosystem II |
| Theta-carotene | Orange | 480 nm | Periphery | Photoprotection |
| Ther xanthophyll | Yellow | 450 nm | Inner antenna | Heat dissipation, Ther cycle |
| Seriflavin | Purple | 620 nm | Lower side of the leaf | Capture of reflected light |
The double-sided leaf. Upper side saturated with chromophyll a/b (direct light of Khar'Vex), lower side with seriflavin, capturing light reflected from soil and neighboring leaves. In jungle understory up to 23% of a leaf's photosynthesis comes from upward scattered light.
The Ther cycle. Ther xanthophyll reversibly converts into theroflavin, dissipating 78% of excess energy as heat in 2–4 minutes. Plants endure brief illuminances up to 1,100 W/m² without damage, though photosynthesis saturates at 420 W/m².
09.2 The Vascular System and Silicon
Amorphous silica (SiO₂) is deposited in the cell walls of conducting elements throughout the flora.
| Division | SiO₂ content in dry mass | Tissue hardness (Mohs) | Water transport |
|---|---|---|---|
| Chromophyta | 2–9% | 2.5–4.0 | Vessels + tracheids |
| Silophyta | 8–35% | 3.5–5.5 | Tracheids only |
| Thexophyta (epiphytes) | 3–7% | 2.0–3.0 | Moisture capture by bark |
| Thalophyta (algae) | 4–18% | — | Osmotic |
| Bryoforma | 5–22% | — | Capillary |
Silicon performs four functions: structural (rigidity), protective (against herbivores), radiative (UV shielding), and hydraulic (reduced cavitation under water stress). The silicon ring around vascular bundles prevents vessel collapse at negative water pressure, allowing Chromophyta to reach 100+ sha.
Concentrating metabolism. Over 60% of vascular species pump CO₂ into bundle-sheath cells, where chromophyll works at 6–8 times atmospheric substrate concentration.
| Parameter | C₃-like | Concentrating |
|---|---|---|
| Share of species | ~40% | ~60% |
| Photorespiration (losses) | 22–30% | 8–12% |
| Transpiration (rel.) | 100 | 75 |
| Photosynthetic efficiency | 3.0–3.6% | 4.2–4.9% |
| Ecological optimum | Humid forests, coasts | Dry savannas, steppes, highlands |
09.3 Systematics: A Deeper Survey
| Division | Described species | Estimated total | Root clade | Key feature |
|---|---|---|---|---|
| Chromophyta | 120,000 | ~155,000 | ~620 million cycles | Chromophyll a/b, vessels with silicon |
| Silophyta | 45,000 | ~60,000 | ~380 million cycles | Silicon skeleton, tracheids |
| Thexophyta | 38,000 | ~52,000 | ~340 million cycles | Epiphytism, H₂S filtration |
| Thalophyta | 32,000 | ~46,000 | ~1,050 million cycles | Thal phycobilin, gametes |
| Bryoforma | 28,000 | ~41,000 | ~900 million cycles | Parenchymatous, without vessels |
| Others (incert.) | 117,000 | ~166,000 | — | — |
| Total | 380,000 | ~520,000 | — | — |
Chromophyta — red-leaved, the dominant terrestrial group, 6 subclasses:
| Subclass | Species | Form | Example | Range |
|---|---|---|---|---|
| Tor-Chroma (giants) | 8,400 | Trees 40–104 sha | Tor-Khar | Jungles |
| Ven-Chroma (forest) | 31,000 | Trees and shrubs 4–67 sha | Ven-Shar | Temperate forests |
| Khar-Chroma (grasses) | 26,500 | Herbs 0.2–3.7 sha | Khar-Grain | Savannas, steppes |
| Thal-Chroma (coastal) | 19,200 | Mangroves, hygrophytes | Mangro-Ven | Coasts |
| Mor-Chroma (lianas) | 12,400 | Lianas 10–61 sha | Rhu-Koss | Jungles, forests |
| Nur-Chroma (ephemerals) | 22,500 | Annuals | Ash-Grass | Deserts, steppes |
Silophyta — silicon plants, endemic to dry zones, with no terrestrial analogue; silicon is the primary construction material.
PROFILE: Silophyta
Parameter Value SiO₂ content 8–35% of dry mass Forms Shrubs, succulents, grasses, cacti Maximum height 4.9 sha (silicon "trees" of the Raal plateau) Range Shan Desert, highlands of Rhuval, dry zones of Vexar Water regime CAM-like (nocturnal stomata) Reproduction Seeds with a silicon coat; vegetative
The silicon "trees" of the Raal plateau (genus Sha-Tor) reach 4.9 sha with true growth rings; their age reaches 2,800 cycles — the record of plant longevity on Théxar.
09.4 Life Strategies
Plants are synchronized with the calendar of a mean 178.2 local days: six months of 29 days and four Renewal Days, five every fifth year. A typical Chromophyta year has six phases:
| Phase | Dates | Event |
|---|---|---|
| I. Awakening | Onset of growth — Khar-Ven, Serrin-Tash | Bud opening, root growth |
| II. Vegetation | Shoot development — Thalas-Mor, Ven-Khal | Maximum shoot growth |
| III. Flowering | Formation of reproductive organs — Rass-Ur, Sha-En | Reproductive structures |
| IV. Fruiting | Ripening — Khar-Tor, The-Nur | Ripening of fruits and seeds |
| V. Shedding | Preparation for dormancy — Gharra-Vek, Mor-Irk | Leaf fall, storage of substances |
| VI. Dormancy | Dormant period — Thar-Ghal — Veks-An | Deep dormancy; timing depends on local climate |
Chromophyta wood grows six rings per year, one per phase:
| Layer | Phase | Density | Color | Information for dendrochronology |
|---|---|---|---|---|
| 1 | Awakening | Low | Light | Length of the dry season |
| 2 | Vegetation (early) | High | Dark | Abundance of precipitation |
| 3 | Vegetation (late) | Medium | Medium | Temperature |
| 4 | Flowering | High | Dark | Wind regime |
| 5 | Fruiting | Low | Light | Reserve of nutrients |
| 6 | Dormancy | Minimal | Almost white | — |
From the rings of the Mor-Ven (Tree of Time) the Keepers of the Archives reconstruct climate at a resolution of one vegetation phase; continuous series reach 38,000 cycles.
Ephemeral strategies. Annuals of the Shan Desert (genus Ash-Grass) complete their life cycle in 6 weeks after rain; a germination inhibitor breaks down only after a second wetting at an interval of no less than 11 days.
09.5 Unique Forms
Gethers — moving plants. Subclass Ghett-Chroma ("walking chromophytes"), 14 species of ephemeral grasses of the dry plains of Rhuval.
| Parameter | Value |
|---|---|
| Speed | Slow movement as supporting roots are replaced |
| Mechanism | Directed drying-swelling of the root "foot" |
| Migration range | Up to 240 sha in a lifetime |
| Reason for movement | Following local rains |
| Population | ~2.4 billion individuals (seasonal peak) |
A full "step" takes 6–9 minutes; visible movement requires 10–14 days of observation. The storage "foot" of 18–24 root lobes anchors the plant in drought and walks it in the wet season.
Guy-wire lianas. Genus Rhu-Koss (up to 61 sha) climbs Tor-Khar trunks along its own taut fibers anchored in the host's bark, opening a crown at 30–60 sha. One plant intercepts up to 4.1% of the light falling on a canopy patch with 800 times less biomass than the supporting tree.
H₂S-filtering epiphytes. Division Thexophyta absorbs hydrogen sulfide directly from air. Xha-Ven ("the rational fern") forms a cushion filter up to 2.4 sha across; per cycle one plant binds 3–6 ru of sulfur and reduces ground-layer H₂S within a radius of up to 40 sha by 18–26%, with an auxiliary chemotrophic circuit duplicating photosynthesis.
09.6 Evolution of the Flora
| Time (million cycles ago) | Event | Clade |
|---|---|---|
| 3,000 | First chromophyll phototrophs | Ancestors of Thalophyta |
| 1,050 | Radiation of Thalophyta | Thalophyta |
| 900 | Colonization of land (Bryoforma) | Bryoforma |
| 620 | First vascular plants (Chromophyta) | Chromophyta |
| 380 | Silicon innovation | Silophyta |
| 340 | Epiphytism | Thexophyta |
| 180 | C4-like concentrating metabolism | Chromophyta |
| 92 | Six-phase annual cycle | Tor/Thal-Chroma |
| 38 | Gethers | Ghett-Chroma |
| 0.010 | Domestication (Thex-Rice) | Khar-Chroma |
Driving forces: (1) spectral pressure — the spectrum of Khar’Vex, quantum efficiency 0.92, near the theoretical limit; (2) water deficit in dry zones — concentrating metabolism in 60% of species and CAM-like Silophyta strategies; (3) silicon availability — excess dissolved SiO₂ from the elevated metallicity of the crust made biomineralization evolutionarily cheap.
09.7 Plants and Civilization
Six staple crops form the food base:
| Crop | Type | Share of the diet | Varieties | Yield (ru/ha) |
|---|---|---|---|---|
| Thex-Rice | Grain | 65% of calories | 210 | 4.8–7.3 |
| Khar-Grain | Grain | 12% | 92 | 3.6–5.5 |
| Mor-Bean | Legume | 9% (protein) | 41 | 2.4–4.2 |
| Tor-Fruit | Fruit | 6% | 62 | 9.1–15.2 |
| Gharra-Kelp | Marine | 4% | 24 | 18.2–30.3 |
| Khal-Nut | Oilseed | 4% (oil) | 31 | 1.8–3.0 |
Thex-Rice is a domesticated wild grass of the Central Plain of Kharak, cultivated for at least 8,000 years; it contains the full set of the 24 proteinogenic amino acids of Théxar.
| Species | Harvest rotation (cycles) | Application |
|---|---|---|
| Ven-Shar | 60 | Construction, furniture |
| Tor-Khar | 90 | Light structures, plywood |
| Needle-Bark | 45 | Sleepers, supports, paper |
| Sha-Tor | 280 | Instruments, precision technology |
The "six steps" principle (six generations ahead) has governed logging since −600 Y.E.; since +1,300 Y.E. the felling norm has not exceeded 68% of annual increment.
Pharmacopoeia — of ~1,200 medicinal species: Khal-Ven, an antibiotic from Ven-Shar bark; Mor-Thorn, an immunomodulator from Silophyta silicon needles; Gharra-Kelp, anticoagulants and anti-inflammatories; Serrin-Flower, membrane stabilizers used in xenomedicine in contact with the Moryn.
09.8 Conservation of the Flora
| Indicator | Value |
|---|---|
| Protected territories with plant communities | 12% of land |
| Herbarium specimens in the Flora Archive | 2.9 million |
| Seed bank (Khar-Vexar) | 268,000 accessions |
| Extinct plant species (total in history) | 412 |
| Extinct since +2,100 Y.E. | 0 |
| Reintroduced | 23 species |
Ruun Ven
- The photosynthetic apparatus rests on five pigments around chromophyll (570 nm); the double-sided leaf captures both incident and reflected light, and the Ther cycle protects against overheating.
- Silicon biomineralization pervades the whole flora (SiO₂ from 2% to 35% of dry mass), providing rigidity, protection, UV shielding, and vessel resistance to cavitation.
- The flora numbers 380,000 described species; 6 subclasses of Chromophyta (120,000 species) dominate the land, and Silophyta is a unique silicon division of the dry zones.
- The annual cycle of most plants is six-phase and wood grows six rings per year, giving climatic reconstructions at a resolution of one vegetation phase in series up to 38,000 cycles.
- Unique forms include "walking" gethers (gradually changing position), guy-wire lianas, and H₂S-filtering epiphytes binding 3–6 ru of sulfur per cycle.
- Flora evolution is driven by the spectral pressure of Khar'Vex, water deficit, and silicon availability; no plant extinctions have been recorded after +2,100 Y.E.